A Bis(tricarbido) Complex of Iridium and Tungsten: [IrH(C⋮CC⋮W(CO)2{HB(pz)3})2(CO)(PPh3)2]

The fluoride-mediated protodesilylation of [W(⋮CC⋮CSiMe 3 )(CO) 2 {HB(pz) 3 }] (pz = pyrazol-1-yl) in the presence of Vaska's complex provides the first bis(tricarbido) trimetallic complex, [IrH(C⋮CC⋮W(CO) 2 {HB(pz) 3 }) 2 (CO)(PPh 3 ) 2 ], the crystal structure of which reveals a linear nine-membered WC 3 IrC 3 W chain.