A) \[RN{{H}_{2}}\]
B) \[ROH\]
C) \[{{C}_{6}}{{H}_{5}}{{O}^{-}}\]
D) \[C{{H}_{3}}{{O}^{-}}\]
Correct Answer: D
Solution :
Key Idea: Nucleophile is electron rich or negatively charged species. \[R\overset{\bullet \,\bullet }{\mathop{N}}\,{{H}_{2}}\]and\[R\overset{\bullet \,\bullet }{\mathop{\underset{\bullet \,\bullet }{\mathop{O}}\,}}\,H\]are weaker nucleophile because they don't have negative charge. The strength of\[{{C}_{6}}{{H}_{5}}{{O}^{-}},\]decreases due to presence of benzyl group which withdraws electrons from oxygen due to\[-I\]effect. \[C{{H}_{3}}{{O}^{-}}\]is strongest nucleophile because methyl group increases the electron density on oxygen, since it shows\[+I\]effect.
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