Collect. Czech. Chem. Commun. 1981, 46, 1107-1115

Ternary complexes of N-carboxymethylaminoacetohydroxamic acid

Rolf Karlíček, Miroslav Polášek and Vladimír Jokl

Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, 501 65 Hradec Králové


The formation of N-carboxymethylaminoacetohydroxamic acid complexes in solutions with excess copper(II) or iron(III) ions or both of them was studied. In the presence of Cu(II), the binuclear complex Cu2H-1L+ was identified; in the ternary system, the complex CuFeH-1L+ was found. This complex formation is necessarily associated with the ligand structure >N-CH2.CO-NHOH and with a new property of hydroxamic acids of this type - detachment of two hydrogen ions from one carbohydroxamic functional group.