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Thermodynamics of mixed-ligand complex formation of copper(II) ethylenediaminetetraacetate with amino acids in solution

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Abstract

The mixed-ligand complex formation in the systems Cu2+–Edta4−–L (L = His, Lys, Orn, Arg, Im) 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 CuEdtaL, CuEdtaHL, and (CuEdta)2L complexes have been determined. The probable coordination mode for the complexone and the ancillary ligand in the mixed-ligand complexes was discussed.

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Authors and Affiliations

  1. Ivanovo State University, Ermak 39, Ivanovo, 153025, Russia

    M. A. Bazanova, D. F. Pyreu & E. V. Kozlovskii

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  1. M. A. Bazanova
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  2. D. F. Pyreu
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  3. E. V. Kozlovskii
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Correspondence to D. F. Pyreu.

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Bazanova, M.A., Pyreu, D.F. & Kozlovskii, E.V. Thermodynamics of mixed-ligand complex formation of copper(II) ethylenediaminetetraacetate with amino acids in solution. J Therm Anal Calorim 112, 1545–1551 (2013). https://doi.org/10.1007/s10973-012-2659-x

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  • DOI: https://doi.org/10.1007/s10973-012-2659-x

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