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Hofmann bromamide degradation: intermediate, migration, by-products and reagent moles

This type of question, asked 4 times: 2021 Paper 10, 25 Jun 2022, 27 Jun 2022, 8 Apr 2026 S2. All 4 questions below, oldest first.

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  1. Question 1

    2021 Paper 10

    33
    In the reaction of hypobromite with amide, the carbonyl carbon is lost as:

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  2. Question 2

    25 Jun 2022

    48
    The reaction of R−CO−NH2R-CO-NH_{2} with bromine and KOHKOH gives RNH2RNH_{2} as the end product. Which one of the following is the intermediate product formed in this reaction?

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  3. Question 3

    27 Jun 2022

    47
    Given below are two statements: Statements-I: In Hofmann degradation reaction, the migration of only an alkyl group takes place from carbonyl carbon of the amide to the nitrogen atom. Statement-II: The group is migrated in Hofmann degradation reaction to electron deficient atom. In the light of the above statement, choose the most appropriate answer from the options given below:

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  4. Question 4

    8 Apr 2026 S2

    43
    Which statements are True? (A) In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of Br2{Br}_{2} are consumed per mole of an amide (B) Hoffmann bromamide reaction is not given by alkyl amides. (C) Primary amines can be synthesized by Hoffmann bromamide degradation. (D) Secondary amide on reaction with Br2{Br}_{2} and NaOH will give secondary amine. (E) The by-products of Hoffmann degradation are Na2CO3,NaBr{Na}_{2}{CO}_{3},NaBr and H2OH_{2}O. Choose the correct answer from the options given below :

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