Q. The organic chloro compound, which shows complete stereochemical inversion during an $S_{N}2\$reaction is
A) $\left( C_{2}H_{5} \right)_{2}\ CHCl$
B) $\left( CH_{3} \right)_{3}CCl$
C) $\left( CH_{3} \right)_{2}\ CHCl$
D) $CH_{3}Cl$
Explanation
(d)
Nucleophilic substitution bimolecular $(S_{N}2)$ prefers less sterically hindered site to attack. Lesser the steric hindrance better the $S_{N}2\$reaction. So, ease of reaction is $1^{{^\circ}}\ > \ 2^{{^\circ}}\ > \ 3^{{^\circ}}.\ S_{N}2$ involves inversion of configuration stereochemically (Walden inversion)
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.