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Apparent molar volumes of divalent transition metal perchlorates and chlorides in N,N-dimethylacetamide

✍ Scribed by Joanna Krakowiak; Hanna Koziel; Wacław Grzybkowski

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
261 KB
Volume
118
Category
Article
ISSN
0167-7322

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✦ Synopsis

Densities of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) perchlorates and chlorides in N,N-dimethylacetamide (DMA) solutions have been measured over the whole composition range at 10, 20, 25, 30, 40, 50 and 60 8C. Apparent molar volumes, partial molar volumes of the salts at infinite dilution and expansibilities have been evaluated and discussed. It has been demonstrated that the relative stability of the octahedral and tetrahedral complexes is the essential factor determining the solvation of the divalent transition metal cations solvated with N,N-dimethylacetamide molecules. Differences between volumetric properties of DMA solutions of respective perchlorates and chlorides are presented and explained in terms of formation of the chloro-complexes of the divalent transition metal cations.

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