Question:
What is the product Y in the given reaction sequence?
What is the product Y in the given reaction sequence?
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Hofmann bromamide degradation converts an amide into a primary amine containing one carbon atom less than the parent amide.
Updated On: Jun 18, 2026
- \(CH_3CH_2Br\)
- \(CH_3COONa\)
- \(CH_3NH_2\)
- \((CH_3)_2NH\)
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The Correct Option is C
Solution and Explanation
Concept:
Carboxylic acids react with ammonia to form amides on heating. Amides undergo Hofmann bromamide degradation to produce primary amines having one less carbon atom.
Step 1: Formation of amide.
Acetic acid reacts with ammonia. \[ CH_3COOH + NH_3 \rightarrow CH_3COONH_4 \] On heating, \[ CH_3COONH_4 \rightarrow CH_3CONH_2 + H_2O \] Therefore, \[ X=CH_3CONH_2 \] (acetamide)
Step 2: Apply Hofmann bromamide reaction.
\[ CH_3CONH_2 \xrightarrow{Br_2/NaOH} CH_3NH_2 \] The carbonyl carbon is removed during the reaction.
Step 3: Identify Y.
Hence, \[ Y=CH_3NH_2 \] \[ \boxed{CH_3NH_2} \]
Step 1: Formation of amide.
Acetic acid reacts with ammonia. \[ CH_3COOH + NH_3 \rightarrow CH_3COONH_4 \] On heating, \[ CH_3COONH_4 \rightarrow CH_3CONH_2 + H_2O \] Therefore, \[ X=CH_3CONH_2 \] (acetamide)
Step 2: Apply Hofmann bromamide reaction.
\[ CH_3CONH_2 \xrightarrow{Br_2/NaOH} CH_3NH_2 \] The carbonyl carbon is removed during the reaction.
Step 3: Identify Y.
Hence, \[ Y=CH_3NH_2 \] \[ \boxed{CH_3NH_2} \]
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