PYQ Vault
EbooksTutor

Synergic bonding in metal carbonyls and low oxidation states

This type of question, asked 4 times: 28 Jun 2022, 27 Jul 2022, 6 Apr 2023, 5 Apr 2026 S1. All 4 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    28 Jun 2022

    59
    Number of complexes which will exhibit synergic bonding amongst, [Cr(CO)6],[Mn(CO)5]\left\lbrack Cr(CO)_{6} \right\rbrack,\left\lbrack Mn(CO)_{5} \right\rbrack and [Mn2(CO)10]\left\lbrack Mn_{2}(CO)_{10} \right\rbrack is

  2. Question 2

    27 Jul 2022

    130
    Low oxidation state of metals in their complexes are common when ligands:

    Tap an option to check your answer.

  3. Question 3

    6 Apr 2023

    129
    Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R". Assertion A: In the complex Ni(CO)4Ni(CO)_{4} and Fe(CO)5Fe(CO)_{5}, the metals have zero oxidation state. Reason R: Low oxidation states are found when a complex has ligands capable of π\pi-donor character in addition to the σ\sigma-bonding. In the light of the above statements, choose the most appropriate answer from the option given below.

    Tap an option to check your answer.

  4. Question 4

    5 Apr 2026 S1

    36
    The correct statements about metal carbonyls are (A) The metal-carbon bonds in metals carbonyls possess both σ\sigma and π\pi-character. (B) Due to synergic bonding interactions between metals and CO ligand the metal-carbon bond becomes weak. (C) The metal-carbon σ\sigma bond is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of metal. (D) The metal-carbon π\pi bond is formed by the donation of electrons from filled d-orbital of metal into vacant π∗\pi^{*} orbital of CO. Choose the correct answer from the options given below:

    Tap an option to check your answer.