Which of the following alkoxides is the most reactive nucleophile?

Options

A. `CH_(3)overset(..)underset(..)O:^(-)`
B. `C_(6)H_(5)underset(..)overset(..)O:^(-)`
C. `(CH_(3))_(2)CHoverset(..)underset(..)O:^(-)`
D. `(CH_(3))_(3)Cunderset(..)overset(..)O:^(-)`

Answer

A

Explanation

Nucleophile approaches the `C` atom of the substrate. `CH_(3)O^(-)` is the most reactive as it is least sterically hindered.