Physicochemical study of the ternary system copper diacetamide dichloride – potassium chloride – water at 298 Kelvin
Keywords:
copper (II) diacetamide dichloride, potassium chloride, heterogeneous equilibrium, solubility, solid solution, crystal lattice, monoclinic syngonyAbstract
Heterogeneous equilibrium in an aqueous system consisting of copper (II) diacetamide dichloride and potassium chloride has been studied by the isothermal solubility method at 298˚K. The formation of a solid solution of the composition copper (II) diacetamide dichloride - potassium chloride of variable composition was established. The concentration limits of its crystallization from saturated aqueous solution were determined. The individuality of the solid solution was confirmed by IR spectroscopy and X-ray phase analysis. The localization of the chemical bond between acetamide and copper chloride was determined by the shift of absorption bands in the IR spectra of free and coordinated ligand. Comparative analysis of the IR spectra of copper (II) chloride diacetamide and copper (II) diacetamide - potassium chloride solid solution showed good agreement with each other. This means that in the double compound as well as in the solid solution, the metal-ligand bonding is carried out through the oxygen atom of the carbonyl group of acetamide. By X-ray phase analysis it was found that the obtained compound has an individual crystal lattice and belongs to monoclinic syngony.
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