Some aspect of the doubly‐charged ion chemistry of armoatic amines and diamines

Doubly‐charged ion mass spectra of aromatic amines and diamines, as opposed to those of the aromatic hydrocarbons, show strong correlation with empirical formula.[M] ++ is usually the base peak in the spectrum and its main fragmentation involves loss of C 2 H 2 , in sharp contrast wit the [M] + ˙ ion which always loses HCN. Measurement of the Kinetic energy released in chargeseparation reactions can yield useful structural information. Result strongly support the concept of charge‐localization on nitrogen atoms. Extensive scrambiling prior to nfragmentatiom was observed in all isomeric compoounds studied.