Metal Clusters of Iridium with Ruthenium and Osmium

MIXED-METAL CLUSTERS OF IRIDIUM WITH RUTHENIUM AND OSMIUM 

Submitted by ENRIQUE LOZANO DIZ, SUSANNE HAAK, and GEORG SUSS-EINK  

The chemistry of mixed-metal clusters has received much attention because of the catalytic potential of these complexes. Whereas the cluster anions 

Institut de Chimie, Universite de Neuchatel, CH -2000, Neuchatel, Switzerland. 

In a 250-mL Schlenk tube under N2 atmosphere, a mixture of [PPN][Ir(CO)4] (0.26 g, 0.31 mmol) and Ru3(CO)i2 (0.2 g, 0.31 mmol) dissolved in tetrahydro-furan (50 mL) is refluxed for 1 h with vigorous stirring under N2 atmosphere. After removal of the solvent, the brown residue is dissolved in diethyl ether (20 mL), and the resulting solution is filtered, then concentrated 50% in volume. Addition of hexane (60 mL) to the stirred ether solution causes the precipitation of [PPN][Ru3lr(CO)i3] it is isolated in pure form by decantation as a red-brown powder, which is washed with hexane (3x10 mL) and dried in vacuo (0.36 g, 84%). 

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

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