Consider the nucleophilic attacks given below. Select in each pair that shows the greater `S_(N^2)` reaction rate.

Answer

D

Explanation

(A) `Br^(Theta)` is best . L.G than `-O-overset(O)overset(||)C-Me`
(B) `SH^(Theta)` is best `Nu^(Theta) ` than MeSH
(C) `Cl^(Theta)` is best `Nu^(Theta)` than `I^(Theta)` is DMSO
(D) In polar protic solvent `I^(Theta)` is better `Nu^(Theta)` than `Cl^(Theta)`