Question

Which of the following species is a nucleophile?

• A. $ \overset{+}{\mathop{N}}\,{{O}_{2}} $
• B. $ _{.}^{.}C{{X}_{2}} $
• C. $ _{\centerdot }^{\centerdot }\overset{\centerdot \centerdot }{\mathop{N}}\,H_{2}^{-} $
• D. $ \centerdot C{{H}_{3}} $

Answer 1

Answer: (C)

Nucleophiles are electron donating species. Among the given, only $ _{.}^{.}\overset{..}{\mathop{N}}\,H_{2}^{-} $ has a tendency to give lone pair of electrons, so it is a nucleophile.