Characterization of inner- and outer-sphere complexes by thermodynamics and absorption spectra. Part 2. Chloro-complexes of copper(II)

Abstract

Evidence for inner-sphere [CuCl]⁺ from charge-transfer and d–d spectra and from e.s.r. and thermodynamic data has been assessed. The extent of inner-sphere formation is ca. 30 and 55% in 2 mol dm^–3 Na[ClO₄] and 4 mol dm^–3 Li[ClO₄] respectively, from thermodynamic data. Formation constants for [CuCl_n]^2–n(n= 1–4) for 25 °C and I= 5 mol dm^–3 have been derived by spectrophotometry.