Due to the presence of unshared pair of electrons on nitrogen, amines are basic in nature. Aliphatic amines are a stronger base than ammonia due to +I effect of alkyl groups. Aromatic amines are weaker bases than ammonia due to the electron withdrawing nature of the aryl group.
The order of basicity of amines in the gaseous phase:
3° Amines > 2° Amines > 1° Amines > NH3
In aqueous solution basicity of amines:
