Question

Which of the following undergoes $SN$ reaction easily ?

• A. Vinyl bromide
• B. Bromobenzene
• C. p-Nitro bromobenzene
• D. 7-Norbornyl bromide
  

Answer 1

The correct option is C p-Nitro bromobenzene

A. Vinyl halide does not undergo either $S_{N}1$ or $S_{N}2$ reaction.
B. Aryl halide does not undergo $SN$ reaction unless benzene ring is activated by EWG [e.g. $\left(N{O}_2\right)$ group].
C. It undergoes $ArSN$ reaction since the benzene ring is activated by EWG [e.g., $N{O}_2$ group].
D. Bridgehead halides are inert to both $S_{N}1$ and $S_{N}2$ reactions.