Question

Which of the following does, not show $S _{ N _{2}}$ reaction?

• A.
• B. Allyl chloride, $CH_{2}=CH-CH_{2}Cl$
• C. Chlorobenzene. $C_{6}H_{5}Cl$
• D. All of the above

Answer 1

Answer: (B)

Allyl chloride, $CH_{2}=CH-CH_{2}Cl$

Answer 2

Allyl chloride show formation of very stable $CH _{2}= CH - \overset{+}{C}H _{2}$ ion and rest two have partial double bond character in their $C -X$ bond.