SOLUBILITIES AND SOLVATION OF BETA-DIKETONATE COMPLEXES

Solubilities are reported for the acetylacetonates Cr(acac)3, Fe(acac)3, Co(acac)3, Co(acac)2, Ni(acac)2, Cu(acac)2, V(acac)2 and UO2(acac)2 in binary aqueous solvent mixtures with co-solvents including methanol, isopropanol, t-butyl alcohol, dioxan and dimethyl sulphoxide. Solubilities of the bis-trifluoroacetylacetonate, bis-hexafluoroacetylacetonate and bis-dibenzoylmethane complexes, UO2(ligand)2, in methanol-water are also reported. Trends of transfer chemical potentials derived from these solubilities are discussed in terms of solvation and preferential solvation by water and the organic (co)solvents.