On the other hand, anilinium ion obtained by accepting a proton
can have only two resonating structures (kekule) We know that greater the number of resonating structures, greater
is the stability Thus you can infer that aniline (five resonating
structures) is more stable than anilinium ion Hence, the proton
acceptability or the basic nature of aniline or other aromatic amines
would be less than that of ammonia