A trinuclear Fe–Fe–Ni complex formed by ligand reshuffling

Abstract

The title complex, dicarbonyl-3κ2C-(μ3-3,6-dimethyl-3,6-diazaoctane-1,8-dithiolato-1:2:3κ7S:S,N,N′,S′:S,S′)(μ2-3,6-dimethyl-3,6-diazaoctane-1,8-dithiolato-1:2κ5S,N,N′,S′:S)-1,2-diiron(II)-3-nickel(0) [Fe2Ni(C8H18N2S2)2(CO)2], is the second example showing M(μ-SR)2Ni0(CO)2 coordination (M = any metal atom). Both FeII ions are five-coordinated in distorted trigonal–bipyramidal geometries by two N atoms and three S atoms. The Ni atom is four-coordinated in a distorted tetrahedral geometry by two S atoms and two carbonyl ligands. One of the 3,6-dimethyl-3,6-diazaoctane-1,8-dithiolate ligands is disordered, the major component having a refined occupancy of 0.873 (2). The Fe...Fe distance is 3.0945 (3)Å and the Ni...Fe distance is 2.8505 (3) Å.