Question

With which of the following for ${S_N}^2$ reaction, influence of incoming nucleophile is more?

• A. $C{H}_{3}O$
• B. $N{H}_3$
• C. $C{H}_{3}Cl$
• D. $CN$

Answer 1

Answer: (C)

$C{H}_{3}Cl$

${S_N}^2$ reaction is substitution reaction in which one group is easily substituted when there is an attack of the nucleophile.
So more the strength of the bond between the leaving group and carbon, less is the influence of the incoming nucleophile. In $C{H}_{3}Cl$ the strength of a bond between $C-Cl$ is weak hence the influence of incoming nucleophile will be more.