摘要:
                                The complexes [WI2(CO)(NCMe)(eta-2-RC2R)2] (R = Me or Ph) react with one, two, three, four, or five equivalents of CNtBu in CH2Cl2 at room temperature to give [WI2(CO)(CNtBu)(eta-2-RC2R)2] (1 and 2), [WI2(CO)(CNtBu)2(eta-2-RC2R)] (3 and 4), [WI2(CNtBu)3(eta-2-RC2R)] (5 and 6). [WI(CNtBu)4(eta-2-RC2R)]I (7 and 8), [W(CNtBu)5(eta-2-RC2R)]2I (9 and 10) respectively. The H-1 NMR data are used to indicate the likely stereochemistry of 1-10, and the C-13 NMR spectra to indicate the number of electrons donated by the alkyne ligands to the tungsten in selected compounds.