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A series of oxo-and sulfido-bridged molybdenum (V) complexes, Mo2O4L2, Mo2O3L4, Mo2O2S2L2, and Mo2O2S3L2 [L = bis(hydroxyethyl)dithiocarbamate] have been prepared. The complexes with bridging and terminal oxo groups have been synthesized by the reactions of (PyH)2MoOCl5 or MoCl5 and ligand in water. One of the rest two complexes, in which bridging and terminal oxo groups have been replaced by sulfido in Mo2O42+ core, Mo2O2S2L2 have been prepared by addition of triphenylphosphine to a chloroform solution of Mo2OS3L2. While, Mo2OS3L2 is obtained from aqueous solution of (NH4)2MoS4 and ligand in the presence of sodium dithionite. The complexes are identified by elemental analysis, and spectral data of IR, UV-vis, nmr, and mass. Also, the electrochemical behaviour for the complexes in dimethylsulfoxide has been investigated by the cyclic voltammograms.
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