SYNTHESIS, REACTIVITY, AND CRYSTAL-STRUCTURE OF THE FORMALLY COORDINATIVELY UNSATURATED DIRUTHENIUM-HYDRIDO COMPLEX CATION U-H)(MU-CO)(CO)3-(MU-(PR(I)O)2PN(ET)P(OPR(I))2)2]+

Protonation of the coordinatively unsaturated species [Ru2(mu(sb)-CO)2 (CO)2(mu-etipdp)2] [sb - semi-bridging; etipdp = (Pr(i)O)2PN(Et)P(OPr( i))2] affords [RU2(mu-H)(mu-CO)(CO)3-(mu-etipdp)2]+ which, as establis hed by X-ray crystallography, adopts a structure in the solid state co ntaining both a bridging carbonyl and a bridging hydrido group, and wh ich reacts spontaneously at ambient temperature with a wide range of n ucleophiles including carbon monoxide, alkynes, sulfur, carbon disulfi de, and hydride, halide, cyanide, and hydrogensulfide ions.