Acid anhydride on reaction with primary amines gives:

• A. amide
• B. imide
• C. secondary amine
• D. imine

When an acid anhydride reacts with primary amines, the primary amine undergoes a nucleophilic attack on the anhydride. This reaction typically results in the formation of an amide. Therefore, the correct answer is:

Answer

A. amide

Explanation of the Reaction

In this process, the primary amine donates a lone pair of electrons to the carbonyl carbon of the acid anhydride, leading to the formation of an amide and a carboxylic acid as a byproduct.

Key Points

• Acid anhydrides are reactive compounds that can form amides when treated with amines.
• Primary amines contribute a nitrogen atom to the carbonyl group, resulting in an amide linkage.