Complex Constants and Ultraviolet Absorption Spectra
نویسنده
چکیده
The complex formation between Cu (I) Cl and Cl was investigated in a 1 M HC104 ionic medium at 22 °C. In saturated CuCl(s) — Cl'-solutions over the concentration range 0 — 0.25 M Cl" the only complexes observed are CuCl2" and CuCl32-. The complex constants for the formation of these complexes are l o g ß n = —1.31 and log / ? 1 2 = —1.6 respectively. The UV-absorption spectra of CuCl2~ and CuCl32 were determined in the wavelength region 220 —370 nm. The absorption of CuCl," is characterized by a strong band A m ax<200 nm ( c > 2 . 7 • 103) together with a weak band having Am ax = 230nm (£ = 0 .7 -10 3 ) . The spectrum of CuCl32 is composed of two bands with / m a x = 2 3 0 nm (e = 4.7-10 3) and Am a x = 276nm (e = 6.1-10®).
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