Iridium, mixed-metal clusters

Reactivity studies of organic ligands with mixed-metal clusters have been utilized in an attempt to shed light on the fundamental steps that occur in heterogeneous catalysis (Table VIII), although the correspondence between cluster chemistry and surface-adsorbate interactions is often poor. While some of these studies have been mentioned in Section ll.D., it is useful to revisit them in the context of the catalytic process for which they are models. Shapley and co-workers have examined the solution chemistry of tungsten-iridium clusters in an effort to understand hydrogenolysis of butane. The reaction of excess diphenylacetylene with... 

MIXED-METAL CLUSTERS OF IRIDIUM WITH RUTHENIUM AND OSMIUM... 

Mixed-Metal Clusters of Iridium with Ruthenium and Osmium 207... 

A novel mixed-metal Ir-Hg cationic cluster [Ir6Hg8(C0)6Cp6](CF3C02)6 (21) has been prepared from reaction between [Ir(CO)2Cp] and Hg(02CCF3)2. The cluster contains mercury atoms in three different environments (six- and four-coordinate) and five-coordinate iridium atoms arranged in an unprecedented distorted square-pyramidal geometry. ... 

Mixed rhodium-iridium clusters incorporated in zeolites have been formed by thermal decomposition of the appropriate metal carbonyls [286]. 

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