Ternary complexes of copper(I) with 2,9-dimethyl-1,10-phenanthroline and some oxygen-donor ligands

Abstract

A series of eight ternary complexes, viz.[Cu(dmphen)L](dmphen = 2,9-dimethyl-1,10-phenanthroline, L = a bidentate oxygen-donor ligand), has been synthesised and characterised. In those complexes containing a β-diketonate, substitution of CF₃ for CH₃ of the acetylacetonate is accompanied by a shift of the C–O and C–C stretching vibrations to higher frequencies and that of the M–O to lower frequencies, indicative of the strong positive inductive effect of the CF₃ group. The ¹H n.m.r. spectral results indicate that the eight ternary systems, unlike [Cu(dmphen)₂Cl], remain essentially undissociated in chloroform solution.