Nickel(II) complexes bound to an [Fe4S4] cluster via bridging thiolates: Synthesis and crystal structures of model compounds for the active site of nickel CO dehydrogenase
[NiL][L = (SCH2CH2N)-S--(Et)CH2CH2CH2N(Et)CH2CH2S-] 1 reacts with [Fe4S4I4](2-) to afford [(NiL)(2)Fe4S4I2] 3; in 3 the two fragments of 1 are doubly bridged via mu-sulfur of L to iron atoms of the [Fe4S4] core.