Synthesis and molecular structure of [(C5Me5)3Co3(μ3-S)(μ3-SbS4I)], a tricobalt complex with the tripodal ψ-SbS4-ligand

The reaction of K3SbS3 with [Cp*2Co2I4] (Cp*=C5Me5) gave dark brown [Cp*3Co3(μ3-S)(μ3-SbS4I)] (1) in 22% yield. Complex 1 was characterized by 1H-NMR and mass spectra. The crystal structure determination reveals as the central feature a distorted Co3SbS4 cube with the fifth sulfur atom being inserted into one of the three SbS edges. The coordination sphere around the Sb atom in the unprecedented tripodal ψ-Sb(S2)S2-ligand is extended by a weakly coordinated iodine atom [d(SbI)=3.215(1) Å].