Abstract
Twelve copper (I) cyanide, bromide and chloride complexes with disubstituted acetylenes (RR 1C(OH)CCX; R, R 1 = CH 3 or C 2H 5, X = Br, CN or Cl) and dimethylsulphoxide (DMSO) were prepared and characterized. In all cases, the molar ratio of copper to dimethylsulphoxide and disubstituted acetylene was 4:2:1. The 1H NMR, u.v. absorption and i.r. spectra (4000-600 cm −1) of the copper (I) complexes were measured. The elemental analysis and spectral data suggest that the disubstituted acetylene is coordinated to the copper (I) atom via the π-bond using two-electron, three-centre carbon—metal bonds.
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