What is the primary organic product formed when propanamide () is heated with bromine and aqueous ?
Answer and explanation
Correct answer: A. Ethanamine
- Step 1: The Hoffmann bromamide degradation reaction converts an aliphatic or aromatic primary amide into a primary amine containing ONE LESS carbon atom.
- Step 2: Propanamide has 3 carbon atoms. Losing the carbonyl carbon as sodium carbonate yields ethanamine (2 carbon atoms).
Answer
Ethanamine.
Why not the others: Propan-1-amine retains all 3 carbons, which contradicts the degradation mechanism; methanamine has two fewer carbons; and propanoic acid is an oxidation/hydrolysis product.
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