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

Abstract

Two diiron toluene-3,4-dithiolate complexes with a phosphine ligand or a phosphite ligand were prepared and characterized. Treatment of complex [Fe₂(CO)₆{µ-SC₆H₃(CH₃)S}] (1) with one equivalent of ethyldiphenylphosphine or methyldiphenylphosphinite and the decarbonylation agent Me₃NO·2H₂O gave analogues [Fe₂(CO)₅(Ph₂PCH₂CH₃){µ-SC₆H₃(CH₃)S}] (2) [Fe₂(CO)₅(Ph₂POCH₃){µ-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.