Octahedral metal carbonyls-XXIX: Mass spectra ofcis-disubstituted derivatives of the group VI-B metal carbonyls

摘要: The mass spectra of a number cis-disubstituted derivatives the Group VI-B metal carbonyls (M = Cr, Mo, W), in which substituents are bidentate ligands bonding to through As, S or N donor atoms, have been obtained. for o-phenylenebis-(dimethylarsine) (diars) examined greatest detail. For these latter complexes, competitive loss and diars methyl groups was observed. proposed use such competition evaluation metal-carbonyl bond strengths is examined. complexes containing ethylene-bridged ligands, ions indicative five fragments 28 units from parent ion, corresponding four ethylene bridge, question whether occurs prior to, competitively with after carbonyl considered.