Über die Natur der Übergangsmetall‐Kohlenstoff‐σ‐Bindung. II. Massenspektrometrische Untersuchungen von Mono‐organyl‐Übergangsmetallkomplexen des Phthalocyanins und Salens

The Nature of the Transition Metal to Carbon σ‐bond. II. Mass Spectrometric Investigations of Mono‐organyl‐Transition Metall Complexes of Phthalocyanine and Salen In the mass spectra of monomethyl and monophenyl complexes of Fe(III) and Co(III) phthalocyanines (RMPc) there are observed peaks at higher mass numbers than that of the molecular ion which are described to products containing more than one organyl group. It is concluded from the mass spectra and the ionization efficiency curves of the ions R2MPc+, RMPc+ and MPc+ that, due to the high temperature in the inlet system of the mass spectrometer, in the solid state a loss of the organyl residue R and an attack of the radicals at the phthalocyanine ring takes place. The mass spectra of methyl‐ and phenyl‐cobalt(III)‐salen do not contain any peaks at higher mass numbers than the molecular ion. The problems of mass spectrometric determination of the strength of the transition metal to carbon σ‐bond are discussed.