Reaction of [{Ru(CO)2(η-C5H5)}2(µ-C≡C)] with [Mo2(CO)4(η-C5H5)2] gave [MoRu2(µ2-CO)3[µ3-C≡C{Ru(CO)2(η-C5H5)}](η-C5H5)3] as the major product after chromatography and not the expected dimolybdenum ‘alkynyl’ adduct; this new complex contains a carbide (C2) ligand bound, in triply bridging mode to the MoRu2 triangle, through one carbon and the other in a monohapto fashion to the other ruthenium atom.
