Synthesis and characterization of a tetranuclear cyclopentadienyl molybdenum compound with a #mu#_4-sulfido ligand

摘要

We have recently prepared a cationic dinuclear molybdenum comlex with a bridging thioether ligand [(CpMo)_2(S_2CH_2)(#mu#-SMe)(#mu#-SMe_2)]OTf,1,and have shown that the thioether bridge dssociates in refluxing acetonitrile solution.The resulting coordiantively unsaturated (or solvent-stabilized)intermediate shows limited stability under the thermalconditions employed and has not been successfully isolated.Nevertheless,thermal reactions of 1 in the presence of either four-or two-electron donor molecules have been used to synthesize dinuclear complexes with new bridging or terminal ligands,respectively.