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- W2040203415 abstract "Reaction of [IrH5(PPri3)2]2 with excess of phenylacetylene in pentane gives the tris(alkynyl) complex [Ir(C2Ph)3(PPri3)2]3, whereas with acetylene and propyne the bis(alkynyl) vinyl compounds [Ir(C2R)2(CRCH2)(PPri3)2](R = H, 4; or Me 5) are obtained. Complexes 3–5 react smoothly with H2 to give 2 and the corresponding alkene and thus are supposed to be intermediates in the hydrogenation of alk-1-ynes catalysed by 2. Reaction of [IrH2Cl(PPri3)2]8 with PhC2H occurs stepwise leading to the formation of the mono-, bis- and tris-(alkynyl) iridium(III) derivatives [IrH(Cl)(C2Ph)(PPri3)2]9, [IrCl(C2Ph)2(PPri3)2]10 and 3. From 8 and acetylene, the vinylidene complex [IrCl(CCH2)(PPri3)2]11 is obtained. Treatment of 8 with an equimolar amount of HC2CO2Me gives first the alkynyl hydrido compound [IrH(Cl)(C2CO2Me)(PPri3)2]12 which on warming to 80 °C in benzene rearranges to give the substituted vinylidene isomer [IrCl(CCHCO2Me)(PPri3)2]13 in virtually quantitative yield. The reaction of 8 with 2 equivalents of HC2CO2Me leads to the formation of the bis(alkynyl) complex [IrCl(C2CO2Me)2(PPri3)2]14." @default.
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- W2040203415 title "Vinylidene transition-metal complexes. Part 13. The reactivity of [IrH5(PPri3)2] and [IrH2Cl(PPri3)2] toward Alk-1-ynes: synthesis of four-, five- and six-co-ordinate iridium complexes containing alkynyl, vinyl and vinylidene ligands" @default.
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- W2040203415 doi "https://doi.org/10.1039/dt9910000777" @default.
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