Abstract
The distribution of some β-diketones and of scandium thenoyltrifluoroacetonate between a mixed organic solvent and an aqueous solution was investigated. In the systems composed of two organic solvents which are non-polar or almost non-polar, the regular solution theory gives a satisfactory explanation. Synergisms were observed in the mixed solvent systems composed of a polar solvent and benzene in case of trifluoroacetylacetone, thenoylacetone and thenoyltrifluoroacetone, while in case of acetylacetone the synergism did not appear in any system except ones containing nitrobenzene. On the distribution of scandium thenoyltrifluoroacetonate the synergism appears and the degree of this effect is found to be larger than that of the β-diketone. It was shown that, in the mixed solvent systems, there is a correlation between the distribution coefficients of scandium thenoyltrifluoroacetonate and those of thenoyltrifluoroacetone.
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