Among the following the strongest nucleophilic is

Options

A. `C_(2)H_(5)SH`
B. `CH_(3)COO^(-)`
C. `CH_(3)NH_(2)`
D. `NC CH_(2)^(-)`

Answer

A

Explanation

Nucleophiles are those substances which can donate a pair of electrons. These can be neutral or negative. The nucleophilic power depends on the tendency of species to donate electrons. This is more, when an electron pushing group (+I group) is present. Among the alkyl groups, those having higher number of C-atoms will push more, hence ethyl `gt` methyl.