Question

Cyclohexylamine is stronger base than aniline because:

• A. in aniline electron pair is involved in conjugation
• B. in cyclohexylamine electron pair is involved in canjugation
• C. in aniline - $N{H}_2$ group is protonated
• D. in cyclohexylamine nitrogen has a negative charge.

Answer 1

The correct option is A in aniline electron pair is involved in conjugation

Cyclohexylamine is a stronger base than aniline because in aniline electron pair is involved in conjugation, which makes the electron pair unavailable, where as in cyclohexyl amine, the $-N{H}_2$ group is out side the ring and there is no resonance in the ring also, thereby the lone pair present on the nitrogen is freely available, resulting in a stronger base.