Semiempirical (AM1) calculations of the proton affinities for N1, N1-dimethylformamidines: success and failures in the description of substituent effectsJF Gal, I Leito, PC Maria, E Raczyńska, RW Taft and F AnviaJ. Chim. Phys., 92 (1995) 22-36DOI: https://doi.org/10.1051/jcp/1995920022