Mixed-ligand complex formation of mercury (II) ethylenediaminetetraacetate with cysteine and methionine in aqueous solution |
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| Authors: | Dmitrii F. Pyreu Alexei M. Ryzhakov Matvei S. Gruzdev |
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| Affiliation: | a Ivanovo State University, Ermak 39, Ivanovo 153025, Russia
b Institute of Solution Chemistry, Ivanovo, Russia |
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| Abstract: | The mixed-ligand complex formation in the systems Hg2+-Edta4−-L (L = Cys2−, Met−) has been studied by means of calorimetry, pH-potentiometry and NMR spectroscopy in aqueous solution at 298.15 K and the ionic strength of I = 0.5 (KNO3). The thermodynamic parameters of formation of the HgEdtaL, HgEdtaHL and (HgEdta)2L complexes have been determined. The most probable coordination mode for the complexone and the amino acid in the mixed-ligand complexes is discussed. |
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| Keywords: | Mixed-ligand complex Mercury (II) ethylenediaminetetraacetate Cysteine Methionine |
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