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Thermodynamic and NMR studies of mixed-ligand complex formation of cadmium ethylenediaminetetraacetate with diamines in an aqueous solution

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Abstract

The mixed-ligand complex formation in the systems Cd2 + Edta4–(CH2) n (NH2)2, n = 2 (En), 6 (L) has been NMR and calorimetrically studied in aqueous solution at 298.15 K and the ionic strength of I = 0.5 (KNO3). The thermodynamic parameters of formation of the CdEdtaL2−, CdEdtaHL−, (CdEdta)2L4−, and (CdEdta)2En4− complexes have been determined. The most probable coordination mode for the complexone and the diamine ligand in the mixed-ligand complexes was discussed.

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Acknowledgements

This study was supported by the Ministry of Education and Science of the Russian Federation, Project No. P1360 (Scientific and scientifically pedagogical personnel of Russia during 2009–2013) and the President of the Russian Federation, Grant No. MK-1625.2009.3.

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Authors and Affiliations

  1. Ivanovo State University, Ivanovo, Russia

    Pyreu Dmitrii & Kozlovskii Eugenii

  2. Institute of Solution Chemistry, Ivanovo, Russia

    Gruzdev Matvei & Kumeev Roman

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  1. Pyreu Dmitrii
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  2. Kozlovskii Eugenii
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  3. Gruzdev Matvei
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  4. Kumeev Roman
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Correspondence to Pyreu Dmitrii.

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Dmitrii, P., Eugenii, K., Matvei, G. et al. Thermodynamic and NMR studies of mixed-ligand complex formation of cadmium ethylenediaminetetraacetate with diamines in an aqueous solution. J Therm Anal Calorim 103, 1073–1077 (2011). https://doi.org/10.1007/s10973-010-1138-5

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  • DOI: https://doi.org/10.1007/s10973-010-1138-5

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