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The decreasing order of nucleophilicity for the following anions is CH 3 CO 2 − ,   CH 3 O − ,   C 6 H 5 O − ,   NO 3 −

Options

  1. AC H 3 C O 2 - > C H 3 O - > C 6 H 5 O - > N O 3 -
  2. BC H 3 O - > N O 3 - > C 6 H 5 O - > C H 3 C O 2 -
  3. CC H 3 O - > C 6 H 5 O - > C H 3 C O 2 - > N O 3 -
  4. DC 6 H 5 O - > C H 3 O - > N O 3 - > C H 3 C O 2 -

Correct answer

C. C H 3 O - > C 6 H 5 O - > C H 3 C O 2 - > N O 3 -

Step-by-step solution

Since the electron donating atom is same, the nucleophilicity parallels basicity. A conjugate base of a strong acid is weak and vice-versa. The order of acidity is C H 3 O H < C 6 H 5 O H < C H 3 C O O H < H N O 3 Thus, the order of basicity and nucleophilicity is C H 3 O - > C 6 H 5 O - > C H 3 C O 2 - > N O 3 -

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