TERNARY MIXED-LIGAND COPPER(II) COMPLEXES WITH CHIRAL AMINOPHOSPHONIC ACIDS AND AMINO ACIDS

Article abstract of DOI:10.1007/BF01168069

Ternary mixed-ligand complexes of divalent copper, where one ligand is an α-aminoalkylphosphonic acid (APA) and the second ligand is L-phenylalanine, L-tyrosine, or L-hydroxyphenylalanine, are studied by potentiometric titration in aqueous at 25 deg C and μ=0.1.A maximum in the formation of the ternary complexes is exhibited at pH 7-8.The log K_st for the complexes formed and the statistical parameters characterizing the ternary complexes Δlog K and log X are determined.The effect of substituents on the α-carbon atom of the α-APA and of hydroxy groups on the phenyl substituent of the α-amino acids on the nature of the distribution of the complexes formed is studied.