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Ionization equilibria of copper(II) chloride in dimethyl sulphoxide

✍ Scribed by W. Libuś; M. PilarczyK; T. Szuchnicka

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
593 KB
Volume
25
Category
Article
ISSN
0013-4686

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✦ Synopsis

Visible absorption spectra of the CuCl+ and CuCl; complexes in dimethyl sulphoxide (DMSO) are derived from an auxiliary study of the Cu(CIO,), + Et,NCI mixed solutions of variable chloride concentration. The second step association equilibrium CuCI+ + Cl-= CuCl; is then shown, from the visible absorption spectra, to predominate over a broad concentration range in the solutions of CuC1, in DMSO. Accordingly, the second step association constant is derived from the molar conductivity curve of CuCI, using the Shedlovsky's method, while the first step association constant is estimated from the conductometric data of the most dilute solutions: KY = (16.5 k 1.5)10*, KY = (8 + 0.2)10' at 25°C. The resultsarecompared with those earlier obtained for NiCl, and CoCI, in DMSO solution, non-conformation of the association constants to the Irving-Williams series being pointed out.

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