Halogénocomplexes de cuivre (II) en milieu éthanol anhydre

The complexation of Cu 2+ by X - ions, (X=Cl, Br), is investigated spectrophotometrically at 25 o C in anhydrous ethanol using Li + (X - , CIO 4 - ) electrolyte mixtures maintained at 1M constant ionic strength where the halide analytical concentration increase from 0 up to 1 mol L -1 . The numerical analysis of a large set of absorption spectra covering the UV, visible and near IR demonstrate the simultaneous existence of four successive mononuclear halogenocomplexes, CuX + , CuX 2 , CuX 3 - and CuX 4 2-