Question

The structure of the intermediates involve in the HVZ reaction of bromine with $RC{H}_{2}C{O}_{2}H$ is:

• A. A
• B. B
• C. C
• D. D

Answer 1

Answer: (A), (B)

A
B

In the HVZ reaction, the OH group of COOH group is replaced with Br atom to form -COBr group. This gives the intermediate A.
This is followed by enolisation to give the intermediate B.