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Binary and ternary complexes of Cd(II) involving triethylenetetramine and selected amino acids and DNA units

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Abstract

The formation equilibria of the binary complex of cadmium(II) with triethylenetetramine (Trien) and of ternary complexes Cd(Trien)L, where L refers to amino acids, DNA constituents and related compounds have been investigated. Cd(II) was found to form a highly stable complex with Trien. The acid-base equilibria of Cd(Trien)2+ were characterized. Ternary complexes of amino acids and DNA constituents are formed through stepwise mechanism, whereby Trien binds to Cd(II), followed by interaction with ligand (L), whereas thiol-containing ligands form ternary complexes through a simultaneous mechanism. The formation constants of the complexes were determined at 25 °C and μ, = 0.1M NaNO3. The participation of different ligand functional groups in the complex-formation was examined.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt

    Mohamed M. Shoukry, Mohamed R. Shehata & Mahmoud M. A. Mohamed

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  1. Mohamed M. Shoukry
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  2. Mohamed R. Shehata
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  3. Mahmoud M. A. Mohamed
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Shoukry, M.M., Shehata, M.R. & Mohamed, M.M.A. Binary and ternary complexes of Cd(II) involving triethylenetetramine and selected amino acids and DNA units. Mikrochim Acta 129, 107–113 (1998). https://doi.org/10.1007/BF01246857

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  • DOI: https://doi.org/10.1007/BF01246857

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