ChemInform Abstract: Chemistry of Polynuclear Metal Complexes with Bridging Carbene or Carbyne Ligands. Part 55. Coupling of Methylene and Alkylidyne Groups at a Trimetal Centre; Crystal Structures of (Ru2W(.mu±sigma.:η-trans-CH=C(H)R)(μ-CO)(CO)3(η-C5H5)2(η-C5Me5# ))·CH2Cl2 and (Ru2W(μ3-CCH2R)(μ-CO)3(CO)(η-C5H5)3) (R: C6H4Me-4).

ChemInform Abstract

(Ia) and (Ib) react with (II) to give mixtures of the corresponding trimetal complexes (III) and (IV). (Ic), in a similar reaction, affords (V) and (IVc). The unsaturated complex (V) reversibly reacts with CO to give (IIIc). (IIIc) (space group P1, Z=2) and (IVa) (space group P2₁2₁2₁, Z=4) are investigated by X-ray diffraction.