Chemistry · Textbook solutions
Coordination Compounds
Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. Plus every board question asked from this chapter. · 48 questions
Worked Examples
7 q
Solved Examples
Worked · 7
- Eg 5.1On the basis of the following observations made with aqueous solutions, assign secondary valences to metals in the following compounds:
Formula Moles of AgCl precipitated per mole of the compounds with excess (i) 2 (ii) 2 (iii) 0 (iv) 1 (v) 0 - Eg 5.2Write the formulas for the following coordination compounds: (a) tetraammineaquachloridocobalt(III) chloride (b) potassium tetrahydroxidozincate(II) (c) potassium trioxalatoaluminate(III) (d) dichloridobis(ethane-1,2-diamine)cobalt(III) (e) tetracarbonylnickel(0)
- Eg 5.3Write the IUPAC names of the following coordination compounds: (a) (b) (c) (d) (e)
- Eg 5.4Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion ?
- Eg 5.5Draw structures of geometrical isomers of
- Eg 5.6Out of the following two coordination entities which is chiral (optically active)? (a) (b)
- Eg 5.7The spin only magnetic moment of is . Predict the geometry of the complex ion ?
Intext Questions
10 q
- Intext 5.1Write the formulas for the following coordination compounds: (i) tetraamminediaquacobalt(III) chloride (ii) potassium tetracyanidonickelate(II) (iii) tris(ethane–1,2–diamine) chromium(III) chloride (iv) amminebromidochloridonitrito-N-platinate(II) (v) dichloridobis(ethane–1,2–diamine)platinum(IV) nitrate (vi) iron(III) hexacyanidoferrate(II)
- Intext 5.2Write the IUPAC names of the following coordination compounds: (i) (ii) (iii) (iv) (v) (vi)
- Intext 5.3Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers: (i) (ii) (iii) (iv)
- Intext 5.4Give evidence that and are ionisation isomers.
- Intext 5.5Explain on the basis of valence bond theory that ion with square planar structure is diamagnetic and the ion with tetrahedral geometry is paramagnetic.
- Intext 5.6is paramagnetic while is diamagnetic though both are tetrahedral. Why?
- Intext 5.7is strongly paramagnetic whereas is weakly paramagnetic. Explain.
- Intext 5.8Explain is an inner orbital complex whereas is an outer orbital complex.
- Intext 5.9Predict the number of unpaired electrons in the square planar ion.
- Intext 5.10The hexaquo manganese(II) ion contains five unpaired electrons, while the hexacyanoion contains only one unpaired electron. Explain using Crystal Field Theory.
Exercises
31 q
- Ex 5.1Explain the bonding in coordination compounds in terms of Werner’s postulates.
- Ex 5.2solution mixed with solution in 1:1 molar ratio gives the test of ion but solution mixed with aqueous ammonia in 1:4 molar ratio does not give the test of ion. Explain why?
- Ex 5.3Explain with two examples each of the following: coordination entity, ligand, coordination number, coordination polyhedron, homoleptic and heteroleptic.
- Ex 5.4What is meant by unidentate, didentate and ambidentate ligands? Give two examples for each.
- Ex 5.5Specify the oxidation numbers of the metals in the following coordination entities: (i) (ii) (iii) (iv) (v)
- Ex 5.6Using IUPAC norms write the formulas for the following: (i) Tetrahydroxidozincate(II) (ii) Potassium tetrachloridopalladate(II) (iii) Diamminedichloridoplatinum(II) (iv) Potassium tetracyanidonickelate(II) (v) Pentaamminenitrito-O-cobalt(III) (vi) Hexaamminecobalt(III) sulphate (vii) Potassium tri(oxalato)chromate(III) (viii) Hexaammineplatinum(IV) (ix) Tetrabromidocuprate(II) (x) Pentaamminenitrito-N-cobalt(III)
- Ex 5.7Using IUPAC norms write the systematic names of the following: (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix)
- Ex 5.8List various types of isomerism possible for coordination compounds, giving an example of each.
- Ex 5.9How many geometrical isomers are possible in the following coordination entities? (i) (ii)
- Ex 5.10Draw the structures of optical isomers of: (i) (ii) (iii)
- Ex 5.11Draw all the isomers (geometrical and optical) of: (i) (ii) (iii)
- Ex 5.12Write all the geometrical isomers of and how many of these will exhibit optical isomers?
- Ex 5.13Aqueous copper sulphate solution (blue in colour) gives: (i) a green precipitate with aqueous potassium fluoride and (ii) a bright green solution with aqueous potassium chloride. Explain these experimental results.
- Ex 5.14What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is obtained when is passed through this solution?
- Ex 5.15Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory: (i) (ii) (iii) (iv)
- Ex 5.16Draw figure to show the splitting of orbitals in an octahedral crystal field.
- Ex 5.17What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.
- Ex 5.18What is crystal field splitting energy? How does the magnitude of decide the actual configuration of orbitals in a coordination entity?
- Ex 5.19is paramagnetic while is diamagnetic. Explain why?
- Ex 5.20A solution of is green but a solution of is colourless. Explain.
- Ex 5.21and are of different colours in dilute solutions. Why?
- Ex 5.22Discuss the nature of bonding in metal carbonyls.
- Ex 5.23Give the oxidation state, orbital occupation and coordination number of the central metal ion in the following complexes: (i) (ii) (iii) (iv)
- Ex 5.24Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex: (i) (ii) (iii) (iv) (v)
- Ex 5.25Explain the violet colour of the complex on the basis of crystal field theory.
- Ex 5.26What is meant by the effect? Give an example.
- Ex 5.27Discuss briefly giving an example in each case the role of coordination compounds in: (i) biological systems (ii) medicinal chemistry and (iii) analytical chemistry (iv) extraction/metallurgy of metals.
- Ex 5.28How many ions are produced from the complex in solution?
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- Ex 5.29Amongst the following ions which one has the highest magnetic moment value? (i) (ii) (iii)
- Ex 5.30Amongst the following, the most stable complex is
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- Ex 5.31What will be the correct order for the wavelengths of absorption in the visible region for the following: , , ?
What the board has asked from this chapter
Questions per paper · 26 papers · 2022 to 2026
Bars average the full papers of each year. 73 further questions come from set variants and are listed below.
2022: 1.8 questions per paper. 2023: 5.2 questions per paper. 2024: 4.2 questions per paper. 2025: 4.8 questions per paper. 2026: 5 questions per paper
2026
41 q
- 2Which of the following d-orbitals experience more repulsion in the crystal field splitting of tetrahedral complex ?
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Bonding in Coordination Compounds - 2The oxidation number of Pt in is :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 3The coordination number of Co in is :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 3The oxidation number of Co in is :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 3Which of the following d-orbitals experience more repulsion in the crystal field splitting of octahedral complex ?
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Bonding in Coordination Compounds - 4According to Werner’s theory, the primary valencies of the central metal atom :
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Werner’s Theory of Coordination Compounds - 4The chelating ligand used for the treatment of lead poisoning is :
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Importance and Applications of Coordination Compounds - 5The correct IUPAC name of the complex is :
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Nomenclature of Coordination Compounds - 5Number of possible stereoisomers for the complex will be :
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Isomerism in Coordination Compounds - 5The oxidation number of Co in is :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 6Which of the following is heteroleptic complex ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 7The secondary valency of Co in the complex is
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Werner’s Theory of Coordination Compounds - 7The secondary valency of Pt in is
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Werner’s Theory of Coordination Compounds - 7The secondary valency of Co in is
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Werner’s Theory of Coordination Compounds - 8Which of the following ligands forms a chelate complex ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 17Write IUPAC names of the following compounds : (a) (b)Nomenclature of Coordination Compounds
- 18Write the formulas for the following coordination compounds : (a) Mercury(I) tetrathiocyanato-S-cobaltate(III) (b) Dichloridobis (ethane-1,2-diamine) platinum(IV) nitrateNomenclature of Coordination Compounds
- 19 (a)Write IUPAC names of the following coordination compounds : (i) (ii)Nomenclature of Coordination Compounds
- 20(a) Define didendate ligand. Give an example. (b) Indicate the type of isomerism exhibited by the given complex :Definitions of Some Important Terms Pertaining to Coordination Compounds
- 20 (a)Write IUPAC names of the following compounds : (i) (ii)Nomenclature of Coordination Compounds
- 19 (b)(i) Give a chemical test to show that and are ionisation isomers. (ii) What is meant by the ‘Chelate effect’ ? Give an example.Isomerism in Coordination Compounds
- 19Write IUPAC names of the following compounds : (a) (b)Nomenclature of Coordination Compounds
- 20(a) Define coordination number. (b) Indicate the type of isomerism exhibited by the following complex :Definitions of Some Important Terms Pertaining to Coordination Compounds
- 20 (b)Define the following terms with a suitable example in each case : (i) Ambidentate ligand (ii) Double saltDefinitions of Some Important Terms Pertaining to Coordination Compounds
- 25 (a)Answer the following questions about the complexes and : (i) Write the hybridization involved in each case. (ii) Which of them is the inner orbital complex and which one is the outer orbital complex ? (iii) Compare their magnetic behaviour. [Atomic number : Ni = 28]Bonding in Coordination Compounds
- 25(a) is paramagnetic whereas is diamagnetic. Justify the statement. [Atomic number of Fe = 26] (b) On the basis of crystal field theory write the electronic configuration for ion if .Bonding in Coordination Compounds
- 25(a) Write the IUPAC name of the given complex : (b) Differentiate between a double salt and a complex. (c) Mention the type of isomerism exhibited by the following complex :Nomenclature of Coordination Compounds
- 25(a) is diamagnetic whereas is paramagnetic. Justify the statement. [Atomic number of Co = 27] (b) Write the electronic configuration for ion if on the basis of crystal field theory.Bonding in Coordination Compounds
- 25 (a)When a coordination compound is mixed with excess of solution, 3 moles of AgCl are precipitated per mole of the compound. Write the structural formula of the complex, IUPAC name, its hybridisation and magnetic behaviour on the basis of valence bond theory.Bonding in Coordination Compounds
- 25(a) Write the IUPAC name of the following complex : (b) Differentiate between homoleptic complex and heterolyptic complex. (c) Which type of isomerism is exhibited by the following complex :Nomenclature of Coordination Compounds
- 25(a) Write the IUPAC name of the given complex : (b) Define polydentate ligand. Give an example. (c) Mention the type of isomerism exhibited by the given complex :Nomenclature of Coordination Compounds
- 25(a) Explain why is strongly paramagnetic whereas is weakly paramagnetic. [Atomic number of Fe = 26] (b) On the basis of crystal field theory, write the electronic configuration for ion for which .Bonding in Coordination Compounds
- 25 (b)(i) How many geometrical isomers are possible in each of the following complexes ? (I) (II) (ii) is an inner orbital complex whereas is an outer orbital complex. Why ? [Atomic number : Co = 27, Ni = 28] (iii) Write the formula of Wilkinson catalyst and its use.Isomerism in Coordination Compounds
- 26(a) A coordination compound is mixed with excess of solution, one mole of AgCl is precipitated per mole of the compound. Write the structural formula of the coordination compound. (b) Write the oxidation state and hybridisation of the central metal in the given complex : . [Atomic number : Fe = 26] (c) Why is coloured ? [Atomic number : Ti = 22]Bonding in Coordination Compounds
- 25 (b)(i) Name two coordination compounds which are important in biological systems. (ii) What is meant by chelate effect ? Give an example. (iii) Why are low spin tetrahedral complexes rarely formed ?Importance and Applications of Coordination Compounds
- 26(a) A coordination compound is mixed with excess of solution, three moles of AgCl are precipitated per mole of the compound. Write the structural formula of the coordination compound. (b) Write the oxidation state and hybridisation of the central metal in the given complex : . [Atomic number : Cr = 24] (c) Why is colourless ?Bonding in Coordination Compounds
- 26(a) A coordination compound is mixed with excess of solution, two moles of AgCl are precipitated per mole of the compound. Write the structural formula of the coordination compound. (b) Write the oxidation state and hybridisation of the central metal in the following complex : [Atomic number of Fe = 26] (c) Why is coloured ? [Atomic number of Ni = 28]Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields.30 (a)In octahedral crystal field, energies of which d-orbitals will be raised when ligands approach the central metal atom/ion ? Give reason in support of your answer.Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields.30 (b)Using crystal field theory, write the electronic configuration of central metal atom/ion of the following : (i) (ii) [At. No. : Co = 27]Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields.30 (c)is paramagnetic while is diamagnetic though both are tetrahedral. Why ? [Atomic No. : Ni = 28]Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields.30 (c) [OR]Write hybridization and magnetic behaviour of the complex . [Atomic No. : Fe = 26]Bonding in Coordination Compounds
2025
45 q
- 3According to Werner’s theory of coordination compounds :
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Werner’s Theory of Coordination Compounds - 3Coordination number of Fe in is :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 3Which of the following complexes show linkage isomerism ?
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Isomerism in Coordination Compounds - 4Which of the following complexes shows geometrical isomerism ?
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Isomerism in Coordination Compounds - 4Which of the following complex ion is not optically active ?
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Isomerism in Coordination Compounds - 5The complex ions and are called
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Isomerism in Coordination Compounds - 5The correct IUPAC name of is
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Nomenclature of Coordination Compounds - 6The number of moles of precipitated when excess solution is mixed with one mole of is :
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Werner’s Theory of Coordination Compounds - 6The number of moles of precipitated when excess solution is mixed with one mole of is :
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Werner’s Theory of Coordination Compounds - 6The number of moles of precipitated when excess solution is mixed with one mole of is :
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Werner’s Theory of Coordination Compounds - 6The diamagnetic species is : [At. No. Co = 27, Fe = 26, Ni = 28]
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Bonding in Coordination Compounds - 10The primary and secondary valences of Co in respectively are :
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Werner’s Theory of Coordination Compounds - For questions number 13 to 16, two statements are given - one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (A), (B), (C) and (D) as given below :13Assertion (A) : and are examples of homoleptic complexes. Reason (R) : All the ligands attached to the metal are the same.
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 19 (a)Write the IUPAC name of the complex . Draw the structure of geometrical isomer of this complex which is optically inactive.Isomerism in Coordination Compounds
- 19 (a)Write IUPAC names of the following coordination compounds : (i) (ii)Nomenclature of Coordination Compounds
- 18doesn't give precipitate of AgCl with solution. Write the structural formula and IUPAC name of the complex.Werner’s Theory of Coordination Compounds
- 20does not give precipitate of AgCl with solution. Write the structural formula and IUPAC name of the complex.Werner’s Theory of Coordination Compounds
- 19 (b)Differentiate between : (i) Double salt and Complex compound (ii) Didentate ligand and Ambidentate ligandDefinitions of Some Important Terms Pertaining to Coordination Compounds
- 19 (b)(i) Write the formula of the following coordination compound : Pentaamminecarbonatocobalt(III)chloride (ii) Write the IUPAC name of the linkage isomer of the complex .Nomenclature of Coordination Compounds
- 20Explain is an inner orbital complex whereas is an outer orbital complex. [At. No. Co = 27, Ni = 28]Bonding in Coordination Compounds
- 20Name the following coordination compounds according to IUPAC norms : (a) (b)Nomenclature of Coordination Compounds
- 25(a) Using valence bond theory, explain the hybridization and magnetic behaviour of the following : (i) (ii) [At. no. : Co = 27, Ni = 28] (b) Write the electronic configuration of ion when .Bonding in Coordination Compounds
- 25 (a)Answer the following about the complexes and : (i) Write the hybridization involved in each case. (ii) Which of them is the outer orbital complex and which one is the inner orbital complex ? (iii) Compare their magnetic behaviour. [Atomic number : Fe = 26]Bonding in Coordination Compounds
- 25Using valence bond theory, explain the hybridization and magnetic character of the following : (a) (b) [At. no. : Co = 27, Ni = 28]Bonding in Coordination Compounds
- 24(a) Based on Valence Bond Theory, explain the geometry and magnetic character of . [Atomic number : Ni = 28] (b) Draw the possible isomers of .Bonding in Coordination Compounds
- 24(a) Write the name and structure of a hexadentate ligand. (b) Why is square planar while is tetrahedral ? [Atomic number : Ni = 28]Bonding in Coordination Compounds
- 25Write IUPAC names of the following coordination entities : (a) (b) (c)Nomenclature of Coordination Compounds
- 24(a) What is meant by crystal field splitting energy ? For a ion, write the configuration if (i) , and (ii) . (b) Explain why in tetrahedral coordination entities, low spin configurations are rarely observed.Bonding in Coordination Compounds
- 25 (b)(i) What happens to the colour of complex when heated gradually ? (ii) Write the electronic configuration for ion if P. (iii) Write the hybridization and magnetic behaviour of the complex . [Atomic number : Ni = 28]Bonding in Coordination Compounds
- The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.29 (a)On the basis of CFT, explain why complex is coloured ? What happens on heating the complex ? Give reason. [Atomic no. : Ti = 22]Bonding in Coordination Compounds
- The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.29 (b) (i)What is crystal field splitting energy ?Bonding in Coordination Compounds
- The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.29 (b) (ii)On the basis of and P (pairing energy), how can you differentiate between a strong field ligand and a weak field ligand ?Bonding in Coordination Compounds
- The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.29 (c)Why are low spin tetrahedral complexes rarely observed ?Bonding in Coordination Compounds
- Werner's coordination theory in 1893 was the first attempt to explain the bonding in coordination complexes. It must be remembered that this theory was put forward before the electron had been discovered by J.J. Thomson in 1897, and before the electronic theory of valency. Werner did not have any of the modern instrumental techniques and all his studies were made using simple experimental techniques. Werner was able to explain the nature of bonding in complexes and he concluded that in complexes, the metal shows two different sorts of valency : primary and secondary. Primary valences are normally ionisable whereas secondary valences are non ionisable.30 (a)One mole of precipitates one mole of AgCl when treated with excess of solution. Write (i) the structural formula of the complex, and (ii) the secondary valency of Cr.Werner’s Theory of Coordination Compounds
- Werner's coordination theory in 1893 was the first attempt to explain the bonding in coordination complexes. It must be remembered that this theory was put forward before the electron had been discovered by J.J. Thomson in 1897, and before the electronic theory of valency. Werner did not have any of the modern instrumental techniques and all his studies were made using simple experimental techniques. Werner was able to explain the nature of bonding in complexes and he concluded that in complexes, the metal shows two different sorts of valency : primary and secondary. Primary valences are normally ionisable whereas secondary valences are non ionisable.30 (b)What is the difference between a complex and a double salt ?Definitions of Some Important Terms Pertaining to Coordination Compounds
- Werner's coordination theory in 1893 was the first attempt to explain the bonding in coordination complexes. It must be remembered that this theory was put forward before the electron had been discovered by J.J. Thomson in 1897, and before the electronic theory of valency. Werner did not have any of the modern instrumental techniques and all his studies were made using simple experimental techniques. Werner was able to explain the nature of bonding in complexes and he concluded that in complexes, the metal shows two different sorts of valency : primary and secondary. Primary valences are normally ionisable whereas secondary valences are non ionisable.30 (c) (i)Arrange the following complexes in the increasing order of conductivity of their solution : , ,Werner’s Theory of Coordination Compounds
- Werner's coordination theory in 1893 was the first attempt to explain the bonding in coordination complexes. It must be remembered that this theory was put forward before the electron had been discovered by J.J. Thomson in 1897, and before the electronic theory of valency. Werner did not have any of the modern instrumental techniques and all his studies were made using simple experimental techniques. Werner was able to explain the nature of bonding in complexes and he concluded that in complexes, the metal shows two different sorts of valency : primary and secondary. Primary valences are normally ionisable whereas secondary valences are non ionisable.30 (c) (ii) ORWrite two differences between primary and secondary valences in coordination compounds.Werner’s Theory of Coordination Compounds
- 32 (A)Answer the following : (a) Low spin tetrahedral complexes are not known. (b) is easily oxidised to in the presence of a strong ligand [At. No. of Co = 27] (c) What type of isomerism is shown by the complex ? (d) Why a solution of is green while a solution of is colourless. (At. No. of Ni = 28) (e) Write the IUPAC name of the following complex :Bonding in Coordination Compounds
- 32 (A)For the complex , identify : (a) the oxidation number of iron. (b) the hybridization and the shape of the complex. (c) the magnetic behaviour of the complex (d) whether there is an optical isomer of the complex ? If so draw its structure. (e) IUPAC name of the complex. (At. no. of Fe = 26)Bonding in Coordination Compounds
- 32 (a)(i) Give reasons : (I) is diamagnetic whereas is paramagnetic. [Atomic number : Ni = 28] (II) CO is a stronger complexing agent than . (III) The trans isomer of complex is optically inactive. (ii) Using Crystal Field theory, write the number of unpaired electrons in octahedral complexes of in the presence of : (I) Strong field ligand (II) Weak field ligand [Atomic number : Fe = 26]Bonding in Coordination Compounds
- 32 (A)In the following complex ions, explain the type of hybridisation, shape and magnetic property : (a) (b) (At. Nos. : Fe = 26, Ni = 28)Bonding in Coordination Compounds
- 32 (B)(a) Using IUPAC norms write the names of the following : (i) (ii) (iii) (b) What is crystal field splitting energy ? Why low spin tetrahedral complexes are not formed ?Nomenclature of Coordination Compounds
- 32 (B)(a) Write IUPAC names of the following : (i) (ii) (iii) (b) What is spectrochemical series ? Write the difference between a strong field ligand and a weak field ligand.Nomenclature of Coordination Compounds
- 32 (B)(a) What is meant by 'Chelate effect' ? Give an example. (b) Write the hybridization and magnetic behaviour of . (Atomic number : Fe = 26) (c) If does not react with , what will be its formula ?Bonding in Coordination Compounds
- 32 (b)(i) Name the type of isomerism exhibited by the following compounds. Also draw their corresponding isomers. (I) (II) (III) (ii) Differentiate between weak field and strong field ligands. How does the strength of the ligand influence the spin of the complex ?Isomerism in Coordination Compounds
2024
36 q
- 1Which of the following ligands can show linkage isomerism in a coordination compound ?
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Isomerism in Coordination Compounds - 1Which of the following ligands is an ambidentate ligand ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 2On adding solution to 1 mole of , one mole of AgCl is precipitated. The secondary valency of Co is :
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Werner’s Theory of Coordination Compounds - 2The coordination number of Co in is :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 2The type of isomerism shown by the complex is :
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Isomerism in Coordination Compounds - 2Ligand is an example of a :
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 2On adding solution to 1 mole of complex , two moles of AgCl are formed. The secondary valency of Ni in the complex will be :
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Werner’s Theory of Coordination Compounds - 2The type of isomerism shown by the complex is :
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Isomerism in Coordination Compounds - 3Which one of the following hybrid states is associated with low spin complex ?
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Bonding in Coordination Compounds - 3Which of the following ligand forms chelate complex ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 3Which one of the following complexes is non-ionisable ?
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Werner’s Theory of Coordination Compounds - 3Which of the following is diamagnetic in nature ? [Atomic number : Co = 27]
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Bonding in Coordination Compounds - 22(a) Draw the geometrical isomers of the given complex : (b) Write the electronic configuration of ion if . (c) What is a didentate ligand ? Give one example.Isomerism in Coordination Compounds
- 22(a) Draw the geometrical isomers of the given complex : (b) Write the electronic configuration for ion if on the basis of crystal field theory. (c) What is meant by a unidentate ligand ? Give an example.Isomerism in Coordination Compounds
- 22(a) Draw the geometrical isomers of the given complex : (b) Write the electronic configuration of ion if . (c) What is an ambidentate ligand ?Isomerism in Coordination Compounds
- 22Write the IUPAC names of the following coordination compounds (any three) : (a) (b) (c) (d)Nomenclature of Coordination Compounds
- 24(a) Write the formula for the following coordination compound : Potassium tetrahydroxidozincate (II) (b) Arrange the following complexes in the increasing order of conductivity of their solution : , , (c) Identify the type of isomerism exhibited by the following complexes : (i) (ii)Nomenclature of Coordination Compounds
- 25Write IUPAC names of the following coordination compounds : (any three) (a) (b) (c) (d)Nomenclature of Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (a)What is the secondary valence of Co in ?Werner’s Theory of Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (a)Define ambidentate ligand with an example.Definitions of Some Important Terms Pertaining to Coordination Compounds
- The nature of bonding, structure of the coordination compound can be explained to some extent by valence bond theory. The central metal atom/ion makes available a number of vacant orbitals equal to its coordination number. The appropriate atomic orbitals (s, p and d) of the metal hybridise to give a set of equivalent orbitals of definite geometry such as square planar, tetrahedral, octahedral and so on. A strong covalent bond is formed only when the orbitals overlap to the maximum extent. The d-orbitals involved in the hybridisation may be either inner d-orbitals i.e. (n–1) d or outer d-orbitals i.e. nd. The complexes formed are called inner orbital complex (low spin complex) and outer orbital complex (high spin complex) respectively. Further, the complexes can be paramagnetic or diamagnetic in nature. The drawbacks of this theory are that this involves number of assumptions and also does not explain the colour of the complex.29 (a)Predict whether is diamagnetic or paramagnetic and why ? [Atomic number : Co = 27]Bonding in Coordination Compounds
- The nature of bonding, structure of the coordination compound can be explained to some extent by valence bond theory. The central metal atom/ion makes available a number of vacant orbitals equal to its coordination number. The appropriate atomic orbitals (s, p and d) of the metal hybridise to give a set of equivalent orbitals of definite geometry such as square planar, tetrahedral, octahedral and so on. A strong covalent bond is formed only when the orbitals overlap to the maximum extent. The d-orbitals involved in the hybridisation may be either inner d-orbitals i.e. (n–1) d or outer d-orbitals i.e. nd. The complexes formed are called inner orbital complex (low spin complex) and outer orbital complex (high spin complex) respectively. Further, the complexes can be paramagnetic or diamagnetic in nature. The drawbacks of this theory are that this involves number of assumptions and also does not explain the colour of the complex.29 (b)What is the coordination number of Co in ?Definitions of Some Important Terms Pertaining to Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (b)What type of isomerism is shown by and ?Isomerism in Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (b)What type of isomerism is shown by the complex and ?Isomerism in Coordination Compounds
- The nature of bonding, structure of the coordination compound can be explained to some extent by valence bond theory. The central metal atom/ion makes available a number of vacant orbitals equal to its coordination number. The appropriate atomic orbitals (s, p and d) of the metal hybridise to give a set of equivalent orbitals of definite geometry such as square planar, tetrahedral, octahedral and so on. A strong covalent bond is formed only when the orbitals overlap to the maximum extent. The d-orbitals involved in the hybridisation may be either inner d-orbitals i.e. (n–1) d or outer d-orbitals i.e. nd. The complexes formed are called inner orbital complex (low spin complex) and outer orbital complex (high spin complex) respectively. Further, the complexes can be paramagnetic or diamagnetic in nature. The drawbacks of this theory are that this involves number of assumptions and also does not explain the colour of the complex.29 (c)(i) Write the IUPAC name of the given complex : (ii) Explain is an inner orbital or outer orbital complex.Bonding in Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (c)Write the electronic configuration of ion on the basis of crystal field theory when (i) (ii)Bonding in Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (c)Define Chelate effect. How it affects the stability of complex ?Definitions of Some Important Terms Pertaining to Coordination Compounds
- The nature of bonding, structure of the coordination compound can be explained to some extent by valence bond theory. The central metal atom/ion makes available a number of vacant orbitals equal to its coordination number. The appropriate atomic orbitals (s, p and d) of the metal hybridise to give a set of equivalent orbitals of definite geometry such as square planar, tetrahedral, octahedral and so on. A strong covalent bond is formed only when the orbitals overlap to the maximum extent. The d-orbitals involved in the hybridisation may be either inner d-orbitals i.e. (n–1) d or outer d-orbitals i.e. nd. The complexes formed are called inner orbital complex (low spin complex) and outer orbital complex (high spin complex) respectively. Further, the complexes can be paramagnetic or diamagnetic in nature. The drawbacks of this theory are that this involves number of assumptions and also does not explain the colour of the complex.29 (c) ORUsing valence bond theory, deduce the shape and hybridisation of [Atomic number of Ni = 28]Bonding in Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (c) ORFind the oxidation state and coordination number of the central metal ion inDefinitions of Some Important Terms Pertaining to Coordination Compounds
- The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.29 (c) ORFind the coordination number and oxidation state of chromium in .Definitions of Some Important Terms Pertaining to Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds whereas 'The Crystal Field Theory' for coordination compounds is based on the effect of different crystal fields (provided by ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. The crystal field theory attributes the colour of the coordination compounds to d-d transition of the electron. Coordination compounds find extensive applications in metallurgical processes, analytical and medicinal chemistry.30 (a)What is crystal field splitting energy ?Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds whereas 'The Crystal Field Theory' for coordination compounds is based on the effect of different crystal fields (provided by ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. The crystal field theory attributes the colour of the coordination compounds to d-d transition of the electron. Coordination compounds find extensive applications in metallurgical processes, analytical and medicinal chemistry.30 (b)Give reason for the violet colour of the complex on the basis of crystal field theory.Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds whereas 'The Crystal Field Theory' for coordination compounds is based on the effect of different crystal fields (provided by ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. The crystal field theory attributes the colour of the coordination compounds to d-d transition of the electron. Coordination compounds find extensive applications in metallurgical processes, analytical and medicinal chemistry.30 (c)is paramagnetic while is diamagnetic. Explain why. [Atomic No. : Cr = 24, Ni = 28]Bonding in Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds whereas 'The Crystal Field Theory' for coordination compounds is based on the effect of different crystal fields (provided by ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. The crystal field theory attributes the colour of the coordination compounds to d-d transition of the electron. Coordination compounds find extensive applications in metallurgical processes, analytical and medicinal chemistry.30 (c) ORExplain why is an inner orbital complex, whereas is an outer orbital complex. [Atomic No. : Fe = 26]Bonding in Coordination Compounds
- 31Answer any five of the following : (a) How is the crystal field splitting energy for octahedral complex related to that of tetrahedral complex ? (b) Write the IUPAC name of the following complex : (c) Write the geometry and magnetic behaviour of the complex on the basis of Valency Bond Theory (VBT). (d) What type of isomerism is shown by the complex ? (e) For the coordination compound on the basis of crystal field theory, write the electronic configuration for ion if . Is the coordination compound a high spin or low spin complex ? (f) Out of and , which complex is heteroleptic and why ? (g) Draw the structures of optical isomers of .Bonding in Coordination Compounds
- 33Attempt any five of the following : (a) Write the IUPAC name of the complex : (b) Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion ? (c) Arrange the following complex ions in increasing order of their crystal field splitting energy : , , (d) Write the hybridization and magnetic character of the complex on the basis of valence bond theory. [Atomic No. : Ni = 28] (e) Out of and , which one complex is : (i) more stable ? (ii) the high spin complex ? (f) What is the difference between an ambidentate ligand and bidentate ligand ? (g) Write the electronic configuration of in terms of and in an octahedral field when : (i) , and (ii)Bonding in Coordination Compounds
2023
44 q
- 2The oxidation state of Fe in is
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 2Which of the following ligands is an ambidentate ligand ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 2What is the secondary valency of Cobalt in ?
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Werner’s Theory of Coordination Compounds - 5What type of isomerism is shown by the following pair of complex compounds ? and
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Isomerism in Coordination Compounds - 5and exhibit :
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Isomerism in Coordination Compounds - 5The compounds , and exhibit :
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Isomerism in Coordination Compounds - 8The compounds and represent :
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Isomerism in Coordination Compounds - 12How many ions are produced in the solution from the complex ?
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Werner’s Theory of Coordination Compounds - 13Which of the following is a polydentate ligand ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 13Which of the following species is not expected to be a ligand ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 13Which of the following complexes is a 'chelate' complex ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 14In which of the following does the central atom exhibit an oxidation state of +4 ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 14In which of the following does the central atom exhibit an oxidation state of +3 ?
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Definitions of Some Important Terms Pertaining to Coordination Compounds - 14Optical isomerism is not shown by the complex :
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Isomerism in Coordination Compounds - 14The formula of the complex dichloridobis (ethane –1, 2-diamine) platinum (IV) nitrate is
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Nomenclature of Coordination Compounds - 14The magnetic moment of [Atomic number : Ni = 28]
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Bonding in Coordination Compounds - 14Which of the following coordination compounds exhibits linkage isomerism ?
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Isomerism in Coordination Compounds - 14Which of the following is the most stable complex species ?
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Bonding in Coordination Compounds - 14The formula of the complex Iron (III) hexacyanidoferrate (II) is :
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Nomenclature of Coordination Compounds - 14The crystal field splitting energy in tetrahedral crystal field is equal to :
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Bonding in Coordination Compounds - For questions number 15 to 18, two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below :18Assertion (A) : EDTA is a hexadentate ligand. Reason (R) : EDTA has 2 nitrogen and 4 oxygen donor atoms.
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Definitions of Some Important Terms Pertaining to Coordination Compounds - For questions number 15 to 18, two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below :18Assertion (A) : gives a white precipitate with silver nitrate solution. Reason (R) : The complex dissociates to give and ions.
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Werner’s Theory of Coordination Compounds - For Questions number 15 to 18, two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.18Assertion (A) : Low spin tetrahedral complexes are rarely observed. Reason (R) : Crystal field splitting energy is less than pairing energy for tetrahedral complexes.
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Bonding in Coordination Compounds - For Questions number 15 to 18, two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.18Assertion (A) : EDTA is used to determine hardness of water. Reason (R) : EDTA is a bidentate ligand.
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Definitions of Some Important Terms Pertaining to Coordination Compounds - For questions number 15 to 18, two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below :18Assertion (A) : Trans shows optical isomerism. Reason (R) : Optical isomerism is common in octahedral complexes involving didentate ligands.
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Isomerism in Coordination Compounds - 19Write IUPAC names of the following : (a) (b)Nomenclature of Coordination Compounds
- 21(a) Which of the following species cannot act as a ligand ? Give reason. , , , (b) The complex is red in colour. Give IUPAC name of its linkage isomer.Definitions of Some Important Terms Pertaining to Coordination Compounds
- 22 (a)Write the IUPAC names of the following : (i) (ii)Nomenclature of Coordination Compounds
- 22 (b)(i) What is a chelate complex ? Give one example. (ii) What are heteroleptic complexes ? Give one example.Definitions of Some Important Terms Pertaining to Coordination Compounds
- 23Write IUPAC names of the following coordination entities : (a) (b)Nomenclature of Coordination Compounds
- 25Write IUPAC names of the following coordination entities : (a) (b)Nomenclature of Coordination Compounds
- 27(a) On the basis of crystal field theory write the electronic configuration for ion with a strong field ligand for which . (b) has tetrahedral geometry while has square planar yet both exhibit dimagnetism. Explain. [Atomic number : Ni = 28]Bonding in Coordination Compounds
- 27(a) On the basis of crystal field theory, write the electronic configuration for with a strong field ligand for which . (b) A solution of is green but a solution of is colourless. Explain. [Atomic number : Ni = 28]Bonding in Coordination Compounds
- 27(a) On the basis of crystal field theory write the electronic configuration for ion with a weak ligand for which . (b) Explain is an inner orbital complex whereas is an outer orbital complex. [Atomic number : Fe = 26]Bonding in Coordination Compounds
- 28Answer any three of the following questions : (a) Explain the type of hybridization in on the basis of valence bond theory. (Given : Atomic number of Fe = 26) (b) Draw the geometrical isomers of ion. (c) is paramagnetic while is diamagnetic though both are tetrahedral. Why ? (d) Name the type of isomerism when ambidentate ligands are attached to central metal ion. Give one example of ambidentate ligand.Bonding in Coordination Compounds
- 30(a) Draw the geometrical isomers of . Which geometrical isomer of is not optically active and why ? (b) Write the hybridisation and magnetic behaviour of . [Given : Atomic number of Co = 27]Isomerism in Coordination Compounds
- Coordination compounds are widely present in the minerals, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems and medicine. Alfred Werner's theory postulated the use of two types of linkages (primary and secondary), by a metal atom/ion in a coordination compound. He predicted the geometrical shapes of a large number of coordination entities using the property of isomerism. The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds. It, however, fails to describe the optical properties of these compounds. The Crystal Field Theory (CFT) explains the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion.32 (i)When a coordination compound is mixed with solution, 2 moles of are precipitated per mole of the compound. Write the structural formula of the complex and secondary valency for Nickel ion.Werner’s Theory of Coordination Compounds
- In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are satisfied by negatively charged ions. Secondary valencies are non-ionisable and are satisfied by neutral or negative ions having lone pair of electrons. Primary valencies are non-directional while secondary valencies decide the shape of the complexes.32 (i)If does not react with , what will be its formula ?Werner’s Theory of Coordination Compounds
- Coordination compounds are widely present in the minerals, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems and medicine. Alfred Werner's theory postulated the use of two types of linkages (primary and secondary), by a metal atom/ion in a coordination compound. He predicted the geometrical shapes of a large number of coordination entities using the property of isomerism. The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds. It, however, fails to describe the optical properties of these compounds. The Crystal Field Theory (CFT) explains the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion.32 (ii)Write the IUPAC name of the ionisation isomer of .Isomerism in Coordination Compounds
- In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are satisfied by negatively charged ions. Secondary valencies are non-ionisable and are satisfied by neutral or negative ions having lone pair of electrons. Primary valencies are non-directional while secondary valencies decide the shape of the complexes.32 (ii)What is the secondary valency of ?Werner’s Theory of Coordination Compounds
- Coordination compounds are widely present in the minerals, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems and medicine. Alfred Werner's theory postulated the use of two types of linkages (primary and secondary), by a metal atom/ion in a coordination compound. He predicted the geometrical shapes of a large number of coordination entities using the property of isomerism. The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds. It, however, fails to describe the optical properties of these compounds. The Crystal Field Theory (CFT) explains the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion.32 (iii) (a)Using Valence Bond Theory, predict the geometry and magnetic nature of : (1) (2) [Atomic number : Ni = 28, Fe = 26]Bonding in Coordination Compounds
- In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are satisfied by negatively charged ions. Secondary valencies are non-ionisable and are satisfied by neutral or negative ions having lone pair of electrons. Primary valencies are non-directional while secondary valencies decide the shape of the complexes.32 (iii) (a)(1) Write the formula of Iron(III)hexacyanidoferrate(II). (2) Write the IUPAC name of .Nomenclature of Coordination Compounds
- Coordination compounds are widely present in the minerals, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems and medicine. Alfred Werner's theory postulated the use of two types of linkages (primary and secondary), by a metal atom/ion in a coordination compound. He predicted the geometrical shapes of a large number of coordination entities using the property of isomerism. The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds. It, however, fails to describe the optical properties of these compounds. The Crystal Field Theory (CFT) explains the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion.32 (iii) (b)Give reasons : (1) Low spin tetrahedral complexes are not formed. (2) is an inner orbital complex whereas is an outer orbital complex. [Atomic number : Co = 27, Ni = 28]Bonding in Coordination Compounds
- In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are satisfied by negatively charged ions. Secondary valencies are non-ionisable and are satisfied by neutral or negative ions having lone pair of electrons. Primary valencies are non-directional while secondary valencies decide the shape of the complexes.32 (iii) (b)Write the hybridization and magnetic behaviour of . [Atomic number : Ni = 28]Bonding in Coordination Compounds
2022
17 q
- 4 (a)Write the hybridisation and magnetic character of the following complexes : (i) (ii) (iii) [Atomic number : Ni = 28, Co = 27, Fe = 26]Bonding in Coordination Compounds
- 5 (a)(i) Write the IUPAC name of the following complex : (ii) Using crystal field theory, write the electronic configuration of ion, if . (iii) What are Homoleptic complexes?Bonding in Coordination Compounds
- 5 (a)(i) Write the electronic configuration of on the basis of crystal field splitting theory if . (ii) is an inner orbital complex whereas is an outer orbital complex. (Atomic number : Co = 27, Ni = 28) (iii) Write the number of ions produced from the complex in solution.Bonding in Coordination Compounds
- 5 (a)(i) On the basis of crystal field theory, write the electronic configuration for ion if . (ii) Using valence bond theory, predict the hybridization and magnetic character of . (Atomic number of Ni = 28) (iii) Write the formula of the following complex using IUPAC norms : Dichloridobis (ethane-1,2-diamine) cobalt (III)Bonding in Coordination Compounds
- 4 (b)(i) Write the IUPAC name of the following complex : (ii) What is the difference between an Ambidentate ligand and a Bidentate ligand ? (iii) Out of and , which complex is more stable and why ?Definitions of Some Important Terms Pertaining to Coordination Compounds
- 5 (b)(i) Why chelate complexes are more stable than complexes with unidentate ligands ? (ii) What is "spectrochemical series" ? What is the difference between a weak field ligand and a strong field ligand ?Bonding in Coordination Compounds
- 5 (b)(i) Calculate the spin only magnetic moment of the complex . (Atomic number of Fe = 26) (ii) Which out of the following two complexes is more stable and why ? , (iii) Write the IUPAC name of the given complex :Bonding in Coordination Compounds
- 5 (a)(i) Write the electronic configuration of on the basis of crystal field splitting theory, if . (ii) with square-planar structure is diamagnetic and with tetrahedral geometry is paramagnetic. Give reason to support the statement. [Atomic number : Ni = 28] (iii) Write the number of ions produced in the solution from the following complex :Bonding in Coordination Compounds
- 5 (a)(i) Write the electronic configuration of on the basis of crystal field splitting theory if . (ii) is weakly paramagnetic whereas is diamagnetic. Give reason to support this statement. [Atomic no. : Fe = 26] (iii) Write the number of ions produced from the complex in solution.Bonding in Coordination Compounds
- 5(a) Write the IUPAC name of the following complex : (b) On the basis of crystal field theory, write the electronic configuration of ion if . (c) What are ambidentate ligands ?Bonding in Coordination Compounds
- 5 (a)(i) Write the IUPAC name of the following complex : (ii) On the basis of crystal field theory, write the electronic configuration of ion, if . (iii) What are Heteroleptic complexes?Bonding in Coordination Compounds
- 5 (b)When a co-ordination compound mixed with , 2 moles of are precipitated per mole of the compound. Write (i) Structural formula of the complex. (ii) Secondary valency of 'Ni' in the complex. (iii) IUPAC name of the complex.Werner’s Theory of Coordination Compounds
- 5 (b)(i) Using IUPAC norms write the formulas for the following : (i.i) Pentaamminenitrito-N-Cobalt (III) (i.ii) Tetrahydroxidozincate (II) (ii) What is crystal field splitting energy ?Nomenclature of Coordination Compounds
- 5 (b)(i) Calculate the spin only magnetic moment of the complex . (Atomic number of Fe = 26) (ii) Write the IUPAC name of the given complex : (iii) Why is the complex more stable than ?Bonding in Coordination Compounds
- 6(a) Using valence bond theory, predict the hybridization and magnetic character of following : [Atomic number of Co = 27] (b) Write IUPAC name of the following complex : (c) How many ions are produced from the complex in solution ?Bonding in Coordination Compounds
- 5 (b)(i) Calculate the spin only magnetic moment of the complex . (Atomic no. of Co = 27) (ii) Write the IUPAC name of the given complex : (iii) Which out of the two complexes is more stable and why ? ,Bonding in Coordination Compounds
- 10(a) Using valence bond theory, predict the hybridization and magnetic character of the complex : (Atomic number : Ni = 28) (b) Write IUPAC name of . (c) Why is a more stable complex than ?Bonding in Coordination Compounds
The 10 board questions to practise first
The questions the board asked again come first, most asked first. Each one says how often and when.
Question 1
Asked 2 times: 2024, 2026
7The secondary valency of Co in isTap an option to check your answer.
Question 2
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3The coordination number of Co in is :Tap an option to check your answer.
Question 3
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8Which of the following ligands forms a chelate complex ?Tap an option to check your answer.
Question 4
Asked 2 times: 2025*, 2026 (* = numbers or wording changed that year)
5The correct IUPAC name of the complex is :Tap an option to check your answer.
Question 5
Asked 2 times: 2023*, 2026 (* = numbers or wording changed that year)
25(a) Explain why is strongly paramagnetic whereas is weakly paramagnetic. [Atomic number of Fe = 26] (b) On the basis of crystal field theory, write the electronic configuration for ion for which .Question 6
Asked 2 times: 2025, 2026
20 (b)Define the following terms with a suitable example in each case : (i) Ambidentate ligand (ii) Double saltQuestion 7
Asked 2 times: 2023, 2025
4Which of the following complex ion is not optically active ?Tap an option to check your answer.
Question 8
Asked 2 times: 2023*, 2025 (* = numbers or wording changed that year)
3Which of the following complexes show linkage isomerism ?Tap an option to check your answer.
Question 9
Asked 2 times: 2023, 2024
2Ligand is an example of a :Tap an option to check your answer.
Question 10
Asked 2 times: 2023*, 2024 (* = numbers or wording changed that year)
1Which of the following ligands is an ambidentate ligand ?Tap an option to check your answer.