Question

Question: Predict the products of the following reactions

a. Cyclopentanone +Br₂ in acetic acid

Short answer

Answer

Step-by-step solution

Acid catalyst alpha halogenation

It is a reaction shown by an enolate ion formed by aldehyde or ketone in which halogenation occurs at the alpha position to the carbonyl.

Reaction of Cyclopentanone + in acetic acid

Cyclopentanone forms the enolate ion on reaction with the acetic acid, followed by the halogenation at the alpha position to the carbonyl of cyclopentanone as shown:

Mechanism

1. Carbonyl is protonated with acetic acid
2. Formation of the enolate ion
3. Alpha halogenation

Mechanism