Solution equilibria between ethylenediamine-N,N'-di-3-propionate and some transition metal(II) ions

J Disic; S Trifunovic; S Grujic; P Djurdjevic

doi:10.1016/s0039-9140(98)00388-9

Solution equilibria between ethylenediamine-N,N'-di-3-propionate and some transition metal(II) ions

Talanta. 1999 Jun 14;49(2):473-82. doi: 10.1016/s0039-9140(98)00388-9.

Authors

J Disic¹, S Trifunovic, S Grujic, P Djurdjevic

Affiliation

¹ Faculty of Science, Institute of Chemistry, P.O. Box 60, 34000 Kragujevac, Yugoslavia.

PMID: 18967621
DOI: 10.1016/s0039-9140(98)00388-9

Abstract

Solution equilibria between the ligand ethylenediamine-N,N'-di-3-propionate (eddp(2-)) and copper(II), nickel(II) or cobalt(II) ions were studied by glass electrode pH-metric and spectrophotometric measurements in 0.1 M NaCl ionic medium at 298.0+/-0.2 K. In the concentration limits 1.0</=[metal(II)]</=5.0, 1.0</=[eddp]</=10.0 and 2.5</=-log[H(+)]</=10.0 mM, the formation of the following complexes with their overall stability constants, log(beta+/-sigma), was proved by the non-linear least-squares data treatment: Cu(eddp), 14.23+/-0.04; Cu(Heddp), 16.17+/-0.08; Cu(OH)eddp, 3.08+/-0.06; Ni(eddp), 8.89+/-0.02; Ni(OH)eddp, -2.15+/-0.06; Co(eddp), 7.16+/-0.03; Co(OH)eddp, -0.83+/-0.04; Co(OH)(2)eddp, -10.54+/-0.05. The mechanism of the formation and structure of the complexes, as well as their possible analytical use, were discussed.