JEE Main · 2022 · Shift-IIeasyGOC-078

Correct order of nucleophilicity is:

General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question

Question

Correct order of nucleophilicity is:

Options
  1. a

    F⁻ > OH⁻

  2. b

    H₂O > OH⁻

  3. c

    ROH > RO⁻

  4. d

    NH₂⁻ > NH₃

    ✓
Correct Answerd

NH₂⁻ > NH₃

Detailed Solution

Step 1: Principles of Nucleophilicity

  • Charged species are generally better nucleophiles than neutral ones (\ceNH2−>NH3,\ceOH−>H2O\ce{NH2^- > NH3}, \ce{OH^- > H2O}).
  • In the same period, nucleophilicity follows the order of lower electronegativity (\ceNH2−>OH−>F−\ce{NH2^- > OH^- > F^-}).

Step 2: Identifying the Correct Order

  • Option D: \ceNH2−>NH3\ce{NH2^- > NH3} is correct because the anionic form is always a stronger nucleophile than its conjugate acid.

Answer: (d) NH2− > NH3\boxed{\text{Answer: (d) $NH_2^-$ > $NH_3$}}

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