ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Halocopper(II) complexes in acetic acid anhydride. II. Composition and properties of chlorobromocopper(II) complexes

Z. Biela, T. Obert, and J. Gažo

Department of Inorganic Chemistry, Slovak Technical University, 880 37 Bratislava

Abstract: A spectrophotometric study of the system Cu(ClO₄)₂.6H₂O-LiCl-LiBr-L (L = Ac₂O) showed that at a X/Cu ratio of 3 (X = Cl + Br) there is an equil. among the complex ions [CuCl₃L]^-, [CuCl₂BrL]^-, [CuClBr₂L]^-, and [CuBr₃L]^- present in the soln. Each complex ion exhibits its own absorption band in the visible region of the spectrum. Exact  ̅ν_max values were obtained by an anal. of the Gaussian curves of the absorption spectra of solns. with various Cu:Cl:Br ratios: ̅ν1 = 15,350, ̅ν2 = 17,000, ̅ν3 = 18,850, ̅ν4 = 20,980 cm^-1. The approx. calcd. values of ε_max correspond to those characteristic for charge-transfer bands. According to the spectral data, the symmetry of the complex anion is not substantially affected by changes in the coordination sphere.

Full paper in Portable Document Format: 301a52.pdf

Chemical Papers 30 (1) 52–57 (1976)