NOVEL REPAGLIMDE COMPLEXES WITH MANGANESE(II), IRON(III), COPPER(II) AND ZINC(II): SPECTROSCOPIC, DFT CHARACTERIZATION AND ELECTROCHEMICAL BEHAVIOUR (300,00 руб.)

2016.  57,  8      –  UDC 541.6:541.49:546.56:546.72 NOVEL REPAGLINIDE COMPLEXES WITH MANGANESE(II), IRON(III), COPPER(II) AND ZINC(II): SPECTROSCOPIC, DFT CHARACTERIZATION AND ELECTROCHEMICAL BEHAVIOUR S. Sadaoui-Kacel1,2, S. Zaater3, N. Bensouilah4, S. Djebbar1 1Laboratoire d™Hydromйtallurgie et Chimie Inorganique Molйculaire, Facultй de Chimie, Universitй de Houari Boumediene Sciences et Technologie, Alger, Algйrie E-mail: safia.djebbar@netcourrier.com 4Laboratoire de Chimie Appliquйe, Universitй 8 Mai 1945, Guelma, Algйrie Received August, 12, 2015 2Dйpartement de Chimie, Facultй des Sciences, Universitй de M™hamed Bougara, Boumerdиs, Algйrie 3Laboratoire de Physico-Chimie thйorique et Chimie Informatique, Facultй de Chimie, Universitй de Houari Boumediene Sciences et Technologie, Alger, Algйrie Revised — May, 7, 2016 Novel transition metal complexes with the repaglinide ligand [2-ethoxy-4-[N-[1-(2piperidinophenyl)-3-methyl-1-1butyl] aminocarbonylmethyl]benzoic acid] (HL) are prepared from chloride salts of manganese(II), iron(III), copper(II), and zinc(II) ions in water-alcoholic media. <...> The infrared, 1H and 13C NMR spectra show the coordination mode of the metal ions to the repaglinide ligand. <...> Magnetic susceptibility measurements and electronic spectra confirm the octahedral geometry around the metal center. <...> The experimental values of FT-IR, 1H, NMR, and electronic spectra are compared with theoretical data obtained by the density functional theory (DFT) using the B3LYP method with the LANL2DZ basis set. <...> Analytical and spectral results suggest that the HL ligand is coordinated to the metal ions via two oxygen atoms of the ethoxy and carboxyl groups. <...> The structural parameters of the optimized geometries of the ligand and the studied complexes are evaluated by theoretical calculations. <...> The order of complexation energies for the obtained structures is as follows: Fe(III) complex < Cu(II) complex < Zn(II) complex < Mn(II) complex. <...> The redox behavior of repaglinide and metal complexes are studied by cyclic voltammetry revealing irreversible redox processes. <...> The chemical properties of compounds containing aromatic carboxyls have been extensively investigated because of their strong ten© Sadaoui-Kacel S., Zaater S. <...>