Question

Among the following the strongest nucleophile is

• A. C₂H₅SH
• B. CH₃COO⁻
• C. CH₃NH₂
• D.

Answer 1

The correct option is A

C₂H₅SH

Although CH³COO⁻ and NCCH^-₂ are -vely charged but the -ve charge on them is stabilized by resonance and hence are less willing to donate a pair of electrons than C₂H₅SH and CH₃NH₂

Among C₂H₅SH and CH₃NH₂ , 'S' is less electronegative than N and hence C₂H₅SH is more willing

to donate a pair of electrons. Thus C₂H₅SH is the strongest nucleophile.