Organic solvent effect on the solution-solid phase equilibria in the systems CuCl2-L-H2O (L = DMSO, DMF, acetonitrile) at 25°C

Stepakova, L. V.; Skripkin, M. Yu.; Korneeva, V. V.; Grigoriev, Ya. M.; Burkov, K. A.
June 2009
Russian Journal of General Chemistry;Jun2009, Vol. 79 Issue 6, p1053
Academic Journal
A solution-solid equilibrium in ternary water-organic systems CuCl2-L-H2O (L = dimethyl sulfoxide, N,N-dimethyl formamide, and acetonitrile) at 25°C was studied. The expansion of crystallization branches of individual solvates CuCl2· xL varies in parallel to the donor power of organic solvents. The existence of the mixed crystal-solvates CuCl2·2H2O·2(CH3)2SO, CuCl2·2H2O·2(CH3)2NCHO, CuCl2·H2O·(CH3)2NCHO, CuCl2·2H2O·CH3CN, and CuCl2·3H2O·2CH3CN in the studied systems was proved. Various donor power of oxygen-containing solvents determines the composition of the first coordination sphere of the copper ion in the specified compounds: the coordination of the both solvents in the mixed crystal-solvates with DMF and the absence of water in the nearest environment of the copper(II) ions in the CuCl2·2H2O·2(CH3)2SO compound.


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