Kinetics and Mechanistic Studies of Oxidation of a Ternary Nitrilotri-Acetatocobalt(II) Complexes Involving DL-valine and DL-aspartic Acid as a Secondary Ligands by Periodate
World Journal of Applied Chemistry
Volume 2, Issue 1, February 2017, Pages: 24-33
Received: Oct. 25, 2016; Accepted: Dec. 9, 2016; Published: Mar. 2, 2017
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Authors
Ahmed A. Abdel-Khalek, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef City, Eygpt
Hassan A. Ewais, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef City, Eygpt
Eman S. H. Khaled, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef City, Eygpt
Abeer A. Atia, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef City, Eygpt
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Abstract
Oxidation of ternary complexes, [CoII (NTA)(L)(H2O)X]-n by periodate in aqueous medium has been studied spectrophotometrically over the (25.0 – 45.0) ± 0.1°C range. The reaction show first order kinetics with respect to both [IO4-] and the complexes, and the rate of the reaction increases over the [H+] range (1.05 – 28.20) x 10-5 mol dm-3 in both cases. Preparation and characterization of [CoII (NTA)(Asp)(H2O)2]-3 and [CoII (NTA)Val(H2O)2]2- is performed. Conformation of the formation of the ternary complexes has been done using IR spectrum, TGA, UV‐visible spectroscopic and cyclic voltammetry measurements. The thermodynamic activation parameters have been calculated. It is assumed that electron transfer takes place via an inner-sphere mechanism.
Keywords
Kinetics, Ternary Co(II) Complexes, Aspartic acid, DL-Valin, UV-spectrophotometer, Inner-Sphere Mechanism, Thermodynamic Activation Parameters
To cite this article
Ahmed A. Abdel-Khalek, Hassan A. Ewais, Eman S. H. Khaled, Abeer A. Atia, Kinetics and Mechanistic Studies of Oxidation of a Ternary Nitrilotri-Acetatocobalt(II) Complexes Involving DL-valine and DL-aspartic Acid as a Secondary Ligands by Periodate, World Journal of Applied Chemistry. Vol. 2, No. 1, 2017, pp. 24-33. doi: 10.11648/j.wjac.20170201.14
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Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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