Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Study of Hydration and Association of Ions in Solution. I. Chromatographic and Electrophoretic Behaviors of Hexamminetype Cobalt(III) Complexes in Aqueous Solutions of Various Electrolytes
Hayami YonedaMasayuki MutoTetsuo BabaTakao Miura
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1971 Volume 44 Issue 3 Pages 689-692


The dissolved state of ions in solution was investigated through the study of separation mechanism of a series of tervalent hexammine-type cobalt(III) complexes in thin-layer chromatography and in electrophoresis. The results obtained are summarized as follows. In the case of strongly hydrated complexes, a strongly hydrated anion has a greater tendency towards association than a weakly hydrated anion. On the contrary, in the weakly hydrated complexes, a weakly hydrated anion is associated more easily than a strongly hydrated anion. From these findings, ionic association was presumed to occur through direct contact of a complex cation and an anion.

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