Reactions of metalloalkynes.‡ The reaction of the ethyne-1,2-diyl complex, [{Ru(CO)2(η-C5H5)}2(µ-C≡C)], with [Mo2(CO)4(η-C5H5)2]. An example of µ3,η1-C≡C coordination of a carbide ligand

Abstract

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.