Q63 / 180 · NEET 2016 (Phase 1) · Chemistry

The correct statement regarding the basicity of aryl amines is:

  • Correct answer
    A
    Aryl amines are generally less basic than alkyl amines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring π electron system.
  • B
    Aryl amines are generally more basic than alkyl amines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring π electron system.
  • C
    Aryl amines are generally more basic than alkyl amines because of aryl group.
  • D
    Aryl amines are generally more basic than alkyl amines, because the nitrogen atom in aryl amines is sp-hybridized.

Solution

Figure

In Aryl amines lone pair is in conjugation with double bond so basic strength decreased

While in aliphatic amine ( R−N H 2 ) no delocalisation of lone pair and +I effect of − CH 3 group so they have more basic strength.

Hence, the correct answer is option: 'A'.

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