Nitrogen Containing CompoundMedium

Question

Which statements are True?

A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of ${Br}_{2}$ 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 ${Br}_{2}$ and NaOH will give secondary amine.

E. The by-products of Hoffmann degradation are ${Na}_{2}{CO}_{3},NaBr$ and $H_{2}O$.

Choose the correct answer from the options given below:

Options

A.A, C and E only
B.B, C and D only
C.C and E only
D.C, D and E only

Solution

Sol. [Key Concept: Only C and E are true: Hofmann bromamide degradation makes primary amines and gives ${Na}_{2}{CO}_{3}$, NaBr and $H_{2}O$ as by-products; the amide$:{Br}_{2}$ stoichiometry claim (A), the 'alkyl amides fail' claim (B) and the secondary-amine claim (D) are false.]

Hoffmann bromamide degradation reaction -

Statement (A) - False

Statement (B) - False

Statement (C) - True

Statement (D) - False

Statement (E) - True

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