Question

Which of the following compound(s) gives $S_{N}1\text{and}{S}_{N}2$ mechanisms?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A), (C)

Allylic and benzylic shows both $S_{N}1$ and $S_{N}2$ reaction.

Benzylic and allylic halides undergo $S_{N}1$ due to the formation of stable carbocation.

Benzylic and allylic halides undergo $S_{N}2$ because the electron deficient transition state is stabilised by the $\pi$ system in the molecule.