Molybdenum(V) dimeric complexes with dialkyl carbamates

Abstract

Syntheses are reported for a number of novel oxo and sulphido bridged molybdenum(V) complexes with N-methyl- N-cyclohexyl carbamate and N,N-dicyclohexyl carbamate as ligands, and we have compared these complexes with the molybdenum(V) complexes with dialkyldithiocarbamates as ligands. These complexes were identified by IR and electronic spectra, magnetic susceptibility and analytical data, and were assigned the formulae [Mo 2O 3(LL) 4], [Mo 2O 4(LL) 2], [Mo 2O 2S 2(LL) 2] and [Mo 2O 3S(LL) 2]. IR and electronic spectra of these compounds are sensitive to substitution of sulphur atoms into the bridge system. It is suggested that the low magnetic moments observed are due, at least in part, to intramolecular metal-metal interactions.