Question

The compound (X) is

(a) CH₃COOH

(b) BrCH₂-COOH

(c) (CH₃CO)₂O

(d) CH₃-COOH 

Answer 1

Correct option (c) (CH₃CO)₂O

Explanation:

This reaction is an example of Perkin's reaction because in it α, β-unsaturated acid is obtained with aromatic aldehydes. Therefore, (X) is acetic anhydride ie, (CH₃CO) ie.(CH₃CO)₂O.

Mechanism of this reaction is represented as follows