Question

Which of the following reactions is/are an $S_{N}2Ar$ reaction(s)?

• A.
• B.
• C.
• D. All of the above.

Answer 1

The correct option is B

In reaction (a) $B{r}^{+}$ is not a nucleophile, so it is not a nucleophilic reaction.
In reaction (c) , the reaction is nucleophilic, but the $-Br$ is not attached to aromatic ring so, it is not a $S_{N}2Ar$ reaction
Reaction (b) has $O{H}^{-}$ as a nucleophile, and $-Br$ attached to aromatic ring i=with an EWG group $-N{O}_2$ present at para position. So it is an $S_{N}2Ar$ reaction