Question

Following compound is treated with $NBS$

Compound formed $A$ is :

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

$NBS(N$-bromosuccinimide) is used for allylic bromination. The given compound in equation undergoes restrictive allylic bromination due to the low concentration of $B{r}_2$ because $N$-bromosuccinimide $(NBS)$ is present with a trace amount of acid (HBr), $HBr$ will react with NBS to give succinimide and $B{r}_2$.