Heteronuclear Nickel-Iron Complexes and the Crystal Structure of [Fe2(CO)6(μ3-S)2{Ni(dppe)}]

A series of heteronuclear nickel‐iron complexes [Fe2(CO)6(μ‐SH)(μ3‐S){NiCl(PPh3)2}] (1), [Fe2(CO)6(μ‐SH)(μ3‐S){NiCl(dppe)}] (2), [Fe2(CO)6(μ3‐S)2{Ni(PPh3)2}] (3), [Fe2(CO)6(μ3‐S)2{Ni(dppe)}] (4) and [Fe2(CO)6(μ‐SPh)(μ3‐S){NiCl(dppe)}] (5) have been prepared. The structure of 4 has been determined by X‐ray crystallography. The central metal‐sulfur core of 4 has a trigonal bipyramidal shape with a NiFe2 base plane with two axial sulfur atoms. Each iron atom is 5‐coordinate forming a distorted square pyramid; the nickel is square planar coordinated by two sulfur atoms and two phosphorus atoms.