Question

3.
hanamine can be obtained if the following
compound is heated with (KOH + Br.]
(2) Methanamide
(4) All the above
10
(1) Ethanamide
(3) Propionamide
Give the ans with soloution

Answer 1

Answer:

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Answer 2

The correct question: Ethanamine can be obtained if the following

compound is heated with (KOH + Br].

(1). Ethanamide

(2). Methanamide

(3). Propionamide

(4). All the above.

The correct answer is option (3). Propionamide.

• Ethanamine can be obtained if propionamide is heated with (KOH + Br].
• The chemical reaction is given by:

$CH_{3}CH_{2}CONH_{2} + Br_{2} +4 KOH (alc).$  →  $CH_{3}CH_{2}NH_{2} + 2KBr + K_{2}CO_{3} + 2H_{2}O.$

• This chemical reaction is called Hoffmann bromamide reaction or Hoffmann bromamide degradation.
• By Hoffmann bromamide reaction, we obtain an amine having one carbon atom less than the parent amide (here, the propionamide).
• Hoffmann bromamide degradation is a method for the preparation of primary amines by treating an amide with bromine in an aqueous or ethanolic solution of sodium hydroxide.
• In such a chemical reaction, the migration of an alkyl or aryl group takes place from carbonyl carbon of the amide to the nitrogen atom.
• Primary amine is an amine in which the amino group is directly bonded to one carbon of any hybridization which cannot be a carbonyl group carbon.

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