Iron carbonyl complexes containing an azomethylene moiety III. Mass-spectrometric study of diiron hexacarbonyl complexes from azomethynes and azines

The electron impact mass spectra of diironhexacarbonyl complexes prepared from benzylidene- and α-naphthylidene-anilines, benzalazine and ketazines of acetophenone, p-bromoacetophenone and benzophenone are studied. The main fragmentation of the ligands occurs only after complete decarbonylation of the molecular ions and involves rupture of metal-ligand bonds, elimination of a part of the central ligand in the form of HCN and RCN, elimination of a neutral aromatic fragment or elimination of a part of the ligand.