Abstract

Abstract Adduct formation equilibria between bis(2-thenoyltrifluoroacetonato)-, bis(trifluoroacetylacetonato)-, and bis(hexafluoroacetylacetonato)copper(II) chelates and tributyl phosphate (TBP) in water-saturated carbon tetrachloride were studied spectrophotometrically at 25 °C. The chelates added one TBP molecule and decreased the absorption, but not very much. The formation constants obtained from the changes in the absorption, given as a function of the TBP concentration, agreed very well with those obtained previously by a solvent-extraction method.

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