1975 Volume 48 Issue 6 Pages 1783-1785
Solubility of tris(1,10-phenanthroline)iron(II) perchlorate was determined at 25°C by spectrophotometry in aqueous solutions of sodium halides, sulfate, acetate, and trichloroacetate up to ionic strength of 0.5. It was found that the solubility is higher in the presence of water-structure breaking anions but is lower in the presence of water-structure making anions than is expected from the change in activity coefficients with ionic strength. This was interpreted in terms of compatibility and incompatibility of the influence of the complex cation on the water structure with that of added anions, and the hydrophobic nature of the complex cation was noted.
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