296233-06-2Relevant articles and documents
Synthesis and characterization of high-nuclearity iridiumruthenium and -gold mixed-metal carbonyl clusters, [Ir7Ru3(CO)23]
Chihara, Tciji,Sato, Mayumi,Konomoto, Hiromi,Kamiguchi, Satoshi,Ogawa, Haruo,Wakatsuki, Yasuo
, p. 2295 - 2299 (2000)
The new carbonyl cluster [PPh4][Ir,Ru3(CO)23] 1 has been obtained by the high yield reaction of [PPh4]2[Ir6(CO),5] with [Ru3(CO)12] in the presence of p-toluenesulfonic acid. The monoanionic decanuclear cluster 1 has an octahedral arrangement of the iridium atoms with three ruthenium atoms and an iridium atom tetrahedrally capping four triangular faces. Two terminal CO ligands are bound to each iridium atom and three to each ruthenium atom. In this synthesisp-toluenesulfonic acid served as a degradation reagent for [Ir6(CO)15]2- to generate the capping {Ir(CO)2}+ moiety. Reaction of 1 with [AuCl(PPh3)] in the presence of AgOSO2CF3 at ambient temperature yielded the undecanuclear neutral cluster [Ir7Ru3(CO)1(AuPPh3)]2. The {AuPPh3}+ group co-ordinates to the apical iridium atom of the parent metal carbonyl monoanion 1 maintaining the cluster framework as well as the stereogeometry of the CO ligands. Thermal treatment of 1 with [AuCl(PPh3)] in refluxing 1,2-dichloroethane caused substitution of the capping {Ir(CO)2}+ group in 1 with an isolobal {AuPPh3}+ group, resulting in the formation of decanuclear monoanionic cluster [PPh4][Ir6Ru3(CO)21(AuPPh 3)]3. The Royal Society of Chemistry 2000.
