Vol. 6, Issue 6 (2018)
Chemical speciation of binary complexes of essential metal ion complexes of L-phenylalanine and maleic acid in DMF-water mixtures
Author(s): Wondimu Tesfa Tefera, Wakgari Bungula Negessa, Tajedin Alansi, Tegene Desalegn Zeleke and Hadgu Haliekiros Belay
Abstract: Speciation of binary complexes of Co(II), Ni(II), and Cu(II) with L-phenylalanine and maleic acid in the presence of Dimethylformamide-water mixtures in the concentration range of 0ā50% v/v DMF has been studied pH-metrically at a temperature of 303K and at an ionic strength of 0.16 mol Lā1. The selection of best fit chemical models is based on statistical parameters and residual analysis. The predominant species detected were ML, ML2, and ML2H2 for Co(II), Ni(II), and Cu(II). The appropriateness of the experimental conditions were verified by introducing errors deliberately. The models containing different numbers of species were refined by using the computer program MINIQUAD75. The chemical speciation was explained based on the distribution diagrams drawn using HYSS HYPERQUAD. The trend in variation of stability constants of the complexes with dielectric constant of the medium was attributed for the formation and possible structures of the complex species presented.
Pages: 91-97 | 703 Views 121 Downloads
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How to cite this article:
Wondimu Tesfa Tefera, Wakgari Bungula Negessa, Tajedin Alansi, Tegene Desalegn Zeleke, Hadgu Haliekiros Belay. Chemical speciation of binary complexes of essential metal ion complexes of L-phenylalanine and maleic acid in DMF-water mixtures. Int J Chem Stud 2018;6(6):91-97.
