Abstract

The title complex, [Fe2(C2H5S)3(C12H21Si)2], has an unusual Fe2S3 core. The two 1,2,3,4-tetra­methyl-5-(trimethyl­silyl)cyclo­penta­dienyl (Cp′) ligands coordinate to the Fe atoms with their C5 planes perpendicular [dihedral angles = 88.23 (7) and 88.55 (7)°] to the Fe—Fe vector, building two Cp′Fe subunits. These two subunits are bridged by three thiol­ate ligands. There are no significant differences in the coordination geometries between the two Fe atoms. The short Fe—Fe distance of 2.7842 (5) Å is clear evidence of an inter­metallic bond. Such a diiron–sulfur structure might act as a model of active sites in some metalloproteins.

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