The correct order of the increasing basicity of methyl amine, ammonia and aniline is

Question

The correct order of the increasing basicity of methyl amine, ammonia and aniline is (A) methyl amine < aniline < ammonia (B) aniline < ammonia < methyl amine (C) aniline < methyl amine < ammonia (D) ammonia < aniline < methyl amine

Tardigrade Admin · Accepted Answer

In aniline the lone pair on N is involved in delocalization with benzene ring and is not available for protonation. Methyl amine is a stronger base than ammonia because +I effect of methyl group increases electron density on N making it more basic than

N H_{3}

.
Cannot be protonated. least basic

+I Effect increases basicity. C H_{2} \to - N H_{2}

Q. The correct order of the increasing basicity of methyl amine, ammonia and aniline is

methyl amine < aniline < ammonia

aniline < ammonia < methyl amine

aniline < methyl amine < ammonia

ammonia < aniline < methyl amine