Solvent effect on the liquid-liquid partition coefficients of copper(II) chelates with some beta-diketones.
Partition coefficients for the copper(II) chelates of trifluoroacetylacetone and thenoyltrifluoroacetone in eleven organic solvent-0.10M aqueous perchlorate solution systems have been determined at 25 degrees . The effect of the organic solvents can be readily explained in term of the concept of regular solutions. The effect of water is discussed in terms of a modified equation based on the regular solution theory and also evaluated by the scaled particle theory. It is suggested that the partition coefficient of the copper(II) chelates is lowered by specific solvent effects of water, such as direct co-ordination to the central metal ion, and hydrogen-bonding to the ligands in the chelate.
Imura
H
H
Department of Chemistry, Faculty of Science, Tohoku University, Sendai 980, Japan.
Suzuki
N
N