Which of the following is the strongest nucleophile ?

Options

A. `C_(2)H_(2)SH`
B. `CH_(3)COO^(-)`
C. `CH_(3)NH_(2)`
D. `NC"C"H_(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 more, when an electron pushing group (+1 group) is present. Among the alkyl groups, those have higher number of C-atoms will push more, hence ethyl `gt` methyl.