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Topic: Basic character of amines· Organic Compounds Containing Nitrogen

The correct order of decreasing basic strength of the given amines is :

1. N-methylaniline > benzenamine > ethanamine > N-ethylethanamine

2. N-ethylethanamine > ethanamine > benzenamine > N-methylaniline

3. N-ethylethanamine > ethanamine > N-methylaniline > benzenamine

4. benzenamine > ethanamine > N-methylaniline > N-ethylethanamine

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Best answer

Answer: 3. N-ethylethanamine > ethanamine > N-methylaniline > benzenamine

Key idea: aliphatic amines are stronger bases than aromatic ones, and among aliphatic amines in water the secondary is usually the strongest.

  • Diethylamine (N-ethylethanamine): two +I ethyl groups, strongest.
  • Ethanamine: primary aliphatic, next.
  • N-Methylaniline: lone pair delocalised into the ring, but the methyl group's +I effect makes it more basic than aniline.
  • Benzenamine (aniline): weakest.

Option (3).

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