Studies in the acid-base theory. The base strength of amines

High-level self-consistent-field calculations have been performed on amines NH3−nRn (with R suitable substituent and n=1,2,3) to study the influence of the substituent on the proton affinity. Corrected for zero-point vibrational energies, calculations agree fairly well with available experimental data. The amine proton affinities are not correlated with nitrogen charge, irrespective of the way used to calculate the charge.