The chemistry of π-cyclopentadienyl nitrosyl molybdenum complexes. Compounds containing bridging iodine and sulphur ligands

Abstract

The syntheses and chemistry of the related binuclear complexes, [(π-C₅H₅)Mo(NO)X₂]₂, [(π-C₅H₅)Mo(NO)X]₂, and [(π-C₅H₅)Mo(NO)(I)(SCH₂Ph)]₂(X = I, SCH₂Ph or SPh) are reported. Examination of the complexes by mass spectral and i.r. techniques has shown that although the structures of [(π-C₅H₅)Mo(NO)X₂]₂ and [(π-C₅H₅)Mo(NO)(I)(SCH₂Ph)]₂ appear to be similar and to contain, probably, two bridging groups X, and two terminal X and NO groups, [(π-C₅H₅)Mo(NO)X]₂ may contain only bridging groups, X and NO, and a Mo–Mo bond. The mixed ligand species, [(π-C₅H₅)Mo(NO)(I)(SCH₂Ph)]₂, is shown spectrally to exist as isomers, one of which contains bridging SCH₂Ph groups and terminal I atoms.