Cluster synthesis by the reactions of [Cp′ 2Fe 2S 4] with transition-metal complexes (Cp′=C 5Me 5, 1,3-C 5H 3(SiMe 3) 2)

Abstract

Cluster synthesis was carried out by the reactions of [Cp′ 2Fe 2S 4] (Cp′=C 5Me 5, 1,3-C 5H 3(SiMe 3) 2) with some transition-metal complexes. The reaction of [Cp* 2Fe 2S 4] (Cp*=C 5Me 5) with [M(CO) 3(MeCN) 3] or [M(CO) 6] (M=Mo, W) resulted in the formation of tetranuclear tetrathiometalate clusters [{Cp*Fe(CO)} 2{M(μ 3-S) 2(μ-S) 2} {M(CO) 4}]. In the reaction, redistribution of S and CO ligands took place between iron and tungsten atoms without losing them. The reaction of [Cp* 2Fe 2S 4] with [Cp*Ru(MeCN) 3](PF 6) gave a tetranuclear cluster [Cp* 4Fe 2Ru 2S 4](PF 6) 2. In contrast, when [Cp S2 2Fe 2S 4] containing a bulky Cp derivative (Cp S2=1,3-C 5H 3(SiMe 3) 2) was used in place of [Cp* 2Fe 2S 4], a trinuclear cluster [(Cp S2Fe) 2(Cp*Ru)S 4](PF 6) was obtained. In the cluster, two disulfido ligands bridged over two iron atoms and one ruthenium atom in μ 3–η 1:η 2:η 2 and μ 3–η 1:η 1:η 2 fashion.