1. - NH ₂ - OR > - F 3. - NR ₂ - OR > - F

Answer: 3. - NR ₂ < - OR < - F The -I effect increases with the electronegativity of the atom attached to the carbon chain: N < O < F. Since R = alkyl is specified in the question, the substituents are -NR₂, -OR, -F and the order is -NR₂<-OR<-F (option 3). Note: option 1 (with -NH₂ ) follows the same logic, so the question is slightly ambiguous; the published answer uses the -NR₂ form.

Topic: Inductive effect, electromeric effect, resonance, hyperconjugation· Some Basic Principles of Organic Chemistry

Which of the following is correct with respect to -I effect of the substituents ? (R = alkyl)

1. \(-\)NH\(_2\) < \(-\)OR < \(-\)F

2. \(-\)NH\(_2\) > \(-\)OR > \(-\)F

3. \(-\)NR\(_2\) < \(-\)OR < \(-\)F

4. \(-\)NR\(_2\) > \(-\)OR > \(-\)F

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Answer: 3. \(-\)NR\(_2\) < \(-\)OR < \(-\)F

The -I effect increases with the electronegativity of the atom attached to the carbon chain: N < O < F.

Since R = alkyl is specified in the question, the substituents are \(\mathrm{-NR_2,\,-OR,\,-F}\) and the order is \(\mathrm{-NR_2<-OR<-F}\) (option 3).

Note: option 1 (with \(\mathrm{-NH_2}\)) follows the same logic, so the question is slightly ambiguous; the published answer uses the \(\mathrm{-NR_2}\) form.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following is correct with respect to -I effect of the substituents ? (R = alkyl)

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