Mixed-Metal Cluster Chemistry. 4. Synthesis and X-ray Crystal Structure of Cp3W3Ir4(μ-H)(CO)12

Heating Cp2W2Ir2(CO)10 with triphenylamine in refluxing tetrahydrofuran affords Cp3W3Ir4(μ-H)(CO)12 (1) in poor yield; an X-ray structural study reveals that the molecule consists of a trigonal bipyramidal CpW{Ir(CO)2}4 unit bicapped by CpW(CO)2 fragments.