Question

Which one of the following compounds will give racemic mixture in $S_{N}1$ reaction?

• A.
• B.
• C.
• D. None of the above

Answer 1

The correct option is B

Stereochemistry in nucleophilic substitution reaction arises due to presence of a chiral carbon in compound.
$S_{N}1$ reaction of an optically active halide is accompanied by racemization and it give equimolar mixture of d and l forms of an optically active compound.
Only b has chiral carbon thus it will give (d) and (l) form in $S_{N}1$ reaction as major product.