Question

What are $X$ and $Y$ in the following reactions?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

The given reactions are as follows :

Reaction $1$



Reaction $2$



Reaction $1$, proceeds via $S _{ N } 2$ mechanism. The attark of nucleophile $\left[ Nu ^{\ominus}\right.$ ] occurs from the backside and the leaving group leaves from the front side. In Reaction $2$, proceeds via $S _{ N } 1$ mechanism. Where no inversion of product takes place.