• Potentiometric investigation of Schiff base equilibria involving salicylaldehyde and tridentateα-aminoacids with Cu(II), Ni(II) and Zn(II) in aqueous medium

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    • Keywords


      Potentiometry; stability constants; Schiff bases; L-threonine; L-glutamine; L-glutamic acid

    • Abstract


      Potentiometric determination of equilibrium constants and species distribution of Schiff base complexes, in aqueous solution, involving salicylaldehyde (A) and tridentateα-amino acids (B)(L-threonine, L-glutamine and L-glutamic acid) with metal ions Cu(II), Ni(II) and Zn(II)(M) indicates preference for the formation of Schiff base complexes rather than the ligands binding as such to the metal ions. Binary stability constants follow the Irving-Williams order Cu(II)>Ni(II)>Zn(II). The influence of additional coordination sites such as -OH, -CONH2 and -COOH in the formation of ternary complexes is also discussed.

    • Author Affiliations


      M Palanichamy1 M Anbu2

      1. Department of Chemistry, Anna University, Madras - 600 025, India
      2. Regional Research Laboratory, Council of Scientific and Industrial Research, Thiruvananthapuram - 695 019, India
    • Dates

  • Journal of Chemical Sciences | News

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