307305-76-6Relevant academic research and scientific papers
Use of the seven-coordinate complexes [MXY(CO)3(NCMe)2] (M = Mo or W; X, Y = halide) and their derivatives in homogeneous catalysis
Al-Jahdali, Mutlaq,Baker, Paul K.,Lavery, Aidan J.,Meehan, Margaret M.,Muldoon, David J.
, p. 51 - 62 (2000)
The seven-coordinate halocarbonyl complexes, [MXY(CO)3(NCMe)2] (M = Mo or W; X, Y = halide) and their derivatives have been investigated in several types of homogeneous catalytic reactions. These include, the alkene metathesis polymerisation of norbornadiene using either, [MX2(CO)3(NCMe)2] (M = Mo or W;X = Br or I), [MI2(CO)3(L'-P, P')] {M=Mo or W; L' = MeC(CH2PPh2)3} or [MXY(CO)L or L'-P, P')(η2-RC2R')] {X,Y = Cl, Br or I; L = PhP(CH2CH2PPh2)2; R,R' = Me, Ph}. The isolation and characterisation of a key intermediate, [WI2(CO)2(η4-nbd)] (1) (nbd = norbornadiene) is also described. The development of water soluble polymerisation catalysts using water-solubilising pyridine ligands, and the biphasic polymerisation of styrene using [WI2(CO)3(NC5H4CO2Na-4)2], ZrCl4, sodium lauryl sulphate and sodium hydrogen phosphate is also discussed. The room temperature polymerisation of phenylacetylene using [WX2(CO)3(NCMe)2] (X = Cl, I), [WI2(CO)3(NCMe)L] (L = PPh3, AsPh3) or b [WBr2(CO)(NCMe)(η2-HC2Ph)2] (4) is also described, and a mechanism is proposed for these polymerisation reactions. (C) 2000 Elsevier Science B.V.
