Use of [Ru(η5-C5h5)(mecn)3]+as a Capping Reagent in Cluster Build-Up: Synthesis and Structural Characterisation of [Os5ru2(co)15(η5-C5h5)2]

Ionic coupling of the mononuclear cation [Ru(η5-C5H5)(MeCN)3]+ with the cluster dianion [Os5(CO)15]2– afforded the neutral heptanuclear cluster [Os5Ru2(CO)15(η5-C5H5)2] which has been shown by X-ray diffraction studies to contain a tricapped tetrahedral metal core.