%0 Journal Article %T Equilibria and Stability in Glycine, Tartrate and Tryptophan Complexes, Investigation on Interactions in Cu(II) Binary and Ternary Systems in Aqueous Solution %A S. A. A. Sajadi %J Open Journal of Inorganic Non-metallic Materials %P 1-6 %@ 2164-6805 %D 2014 %I Scientific Research Publishing %R 10.4236/ojinm.2014.41001 %X

The acidity and stability constants of M(Gly)1, M(Ttr)1, and M(Trp)1 M: Cu2+, Cu(Bpy2)2+, and Cu(Phen3)2+ complexes, were determined by potentiometric pH titration. It is shown that the stability of the binary Cu(L), (L: Gly, Ttr, and Trp) complex is determined by the basicity of the carboxylate group on one side and amino group on the other side. It is demonstrated that the equilibrium, Cu(Ha4)2+ + Cu(L) \"\"Cu(Har)(L) + Cu2+, is displacement due to the well known experience that mixed ligand complexes formed by a divalent 3d ion, a heteroaromatic N base and an O donor ligand possess increased stability. The stability constants of the 1:1 complexes formed between Cu2+, Cu(Bpy)2+ or Cu(Phen)2+ %K Glycine %K Tartaric Acid %K Tryptophan %K Divalent Metal Ions %K Potentiometric Titration %K Acidity and Stability Constants %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=41181