Diiron toluene-3,4-dithiolate complexes with a phosphine ligand ethyldiphenylphosphine or a phosphite ligand methyldiphenylphosphinite: synthesis, characterization, X-ray crystal structures, and electrochemistry

Two diiron toluene-3,4-dithiolate complexes with a phosphine ligand or a phosphite ligand were prepared and characterized. Treatment of complex [Fe-2(CO)(6){mu-SC6H3(CH3)S}] (1) with one equivalent of ethyldiphenylphosphine or methyldiphenylphosphinite and the decarbonylation agent Me3NO center dot 2H(2)O gave analogues [Fe-2(CO)(5)(Ph2PCH2CH3){mu-SC6H3(CH3)S}] (2) [Fe-2(CO)(5)(Ph2POCH3){mu-SC6H3(CH3)S}] (3) and in 84% and 61% yields, respectively. Both analogues have been characterized by spectroscopy, elemental analysis, and X-ray crystallography. The electrochemical properties were probed by cyclic voltammetry.