Preparation and characterization of two isocyanide derivatives of monosubstituted [Fe3(CO)9S2]; crystal structure of [Fe3(CO)8(CNPh)(µ2-S)2]

Irradiation of [Fe(CO)5] in the presence of PhNCS produced [Fe3(CO)9(µ3-S)2] and two isomeric phenyl isocyanide derivatives, [Fe3(CO)8(CNPh)(µ3-S)2], substituted on either a central or a terminal iron atom. The crystal structure of the centrally substituted isomer was determined by X-ray diffraction.