Methyl amine is more basic than aniline.

Methyl amine is more basic than aniline.

Ans.

Methylamine (��3��2CH3​NH2​) is more basic than aniline (�6�5��2C6​H5​NH2​) due to the difference in the nature of their substituents attached to the nitrogen atom.

Here’s why methylamine is more basic than aniline:

1. Availability of lone pair: Methylamine is a primary amine, meaning it has a nitrogen atom directly bonded to one hydrogen atom and one methyl group (��3CH3​). Aniline, on the other hand, is a derivative of benzene with an amino group (��2NH2​) attached to it. In methylamine, the lone pair of electrons on the nitrogen atom is relatively more available for donation compared to aniline.

2. Resonance in aniline: Aniline exhibits resonance stabilization due to the delocalization of electrons in the benzene ring. The lone pair on the nitrogen atom can participate in resonance, leading to partial double bond character between the nitrogen and the benzene ring. This delocalization of electrons reduces the availability of the lone pair on nitrogen for donation, making the nitrogen atom in aniline less basic compared to methylamine.

3. Steric hindrance: In methylamine, the substituent attached to the nitrogen atom is a small methyl group (��3CH3​), which causes minimal steric hindrance and allows the lone pair to be more accessible for protonation. In aniline, the benzene ring is bulkier, which may hinder the approach of a proton to the lone pair on nitrogen, further reducing its basicity.

Therefore, due to the greater availability of the lone pair of electrons and the absence of resonance effects, methylamine is more basic than aniline.