Heterometall-Cluster durch C-H-Spaltung cluster-gebundener Acetylenliganden

Article abstract of DOI:10.1016/0022-328X(88)89042-9

The alkyne-bridged clusters RuCo2(CO)9(μ3-RC<*>CH) can be deprotonated with a variety of bases.With acids, the resulting acetylide-bridged clusters are reconverted into the starting materials.If the deprotonation is performed in triethylamine in presence of catalytic amounts of copper(I) iodide, the organometallic halides Cp(CO)2FeCl, Cp(CO)2RuCl, Cp(PPh3)NiCl, and Cp(CO)3MoCl are incorporated as organometallic acetylides MC<*>CR into the clusters which contain novel RuCo2M metal frameworks.With Cp(CO)3MoCl the main reaction is a metal exchange leading to RuCoMoCp(CO)8(μ3-RC<*>CH) which itself can be converted into the RuCoMo(μ3-RC<*>CMo)-type cluster.These reactions provide new insight into the mechanism of metal exchange.CuI also catalyzes the alkyne-vinylidene rearrangement in these clusters.