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ISSN 2063-5346
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SYNTHESIS, CHARACTERIZATION, THEORETICAL STUDIES AND PHOTOSTABILIZATION OF MEFENAMIC ACID DERIVATIVE WITH SOME DIVALENT METAL IONS

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Adil Ahmed A. Al-Dulimia[a]*, Rehab A. M. Al-Hasani[a] and Emad A. Yousif
» doi: 10.17628/ECB.2016.5.456

Abstract

A new mefenamic acid derivative, (4-amino-5-(2-(2,3-dimethylphenyl)aminophenyl)-1,2,4-triazole-3-thion (L), has been synthesized and characterized by spectroscopic and elemental analysis. The ligand (L) has been used as a chelating agent to prepare complexes of Co(ІІ), Ni(П), Cu(П), Zn(II) and Cd(II) ions. The structure of the complexes, in solid state, has been suggested. The theoretical treatment of the complexes, in the gas phase, has been studied using the Hyperchem-8 program for the molecular mechanics and semi-empirical calculations. The heat of formation (ΔHf○) and binding energy (ΔEb) for the ligand and their complexes were calculated by PM3 method. The electrostatic potential of the ligand (L) has been calculated to investigate the reactive sites of the molecule. Photostabilization of PVC film in air was investigated in the absence and presence of the ligand L and theirs complexes by accelerated weathering tester. It was found that various indices values increased with irradiation time and this increase depend on the type of additives.

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