Journal of Thermal Analysis and Calorimetry

, Volume 100, Issue 1, pp 355–360 | Cite as

Thermodynamics of mixed-ligand complex formation of copper (II) ethylenediaminetetraacetate with hexamethylenediamine in an aqueous solution

  • D. F. Pyreu
  • E. V. Kozlovskii


The mixed-ligand complex formation in the system Cu2+−Edta4−−(CH2)6(NH2)2 (L), where L is hexamethylenediamine has been calorimetrically, pH-potentiometrically and spectrophotometrically studied in aqueous solution at 298.15 K and the ionic strength of I = 0.5 (KNO3). The thermodynamic parameters of formation of the CuEdtaL2−, CuEdtaHL (CuEdta)2L4− and (CuEdta)2En4− complexes have been determined. The most probable coordination mode for the complexone and the ancillary ligand in the mixed-ligand complexes was discussed.


Thermodynamic parameters Mixed-ligand complex Copper (II) ethylenediaminetetraacetate Hexamethylenediamine Denticity 



This work was supported by the Ministry of Education and Science of the Russian Federation, project no. RNP. (Development of the Integration Mechanisms of Ivanovo State University and the Institute of Problems of Chemical Physics of the Russian Academy of Science).

Supplementary material

10973_2009_144_MOESM1_ESM.doc (24 kb)
Supplementary material 1 (DOC 23 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.Ivanovo State UniversityIvanovoRussia

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