Question

Which of the following is most reactive towards $S_{N}2$ reaction?

• A. $C{H}_2=CH-C{H}_2-Cl$
• B. $Ph-C{H}_2-Cl$
• C. $MeO-C{H}_2-Cl$
• D.

Answer 1

Answer: (D)

$\alpha$ -carbonyl compounds are most reactive towards $S_{N}2$ because of stability of transition state by delocalisation of $\pi$ -electron cloud.