A compound 'X' on treatment with Br2/NaOH, provided C3H9N, which gives positive carbylamine test. Compound 'X' is:
(1) CH3CH2CH2CONH2
(2) CH3CON(CH3)2
(3) CH3CH2COCH2NH2
(4) CH3COCH2NHCH3

Question

Accepted Answer

CH3CH2CH2CONH2. Br2/NaOH (Hofmann bromamide degradation) converts a primary amide RCONH2 to RNH2 with one fewer carbon. To obtain C3H9N that gives a positive carbylamine test (a primary amine, propan-1-amine), X must be butanamide CH3CH2CH2CONH2. The other choices are not primary amides and cannot undergo this reaction to give a primary amine.

A compound 'X' on treatment with Br2/NaOH, provided C3H9N, which gives positive carbylamine test. Compound 'X' is: (1) CH3CH2CH2CONH2 (2) CH3CON(CH3)2 (3) CH3CH2COCH2NH2 (4) CH3COCH2NHCH3

Solution

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