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Stability and molecular modelling of cobalt (II) and nickel (II) with polydentate Schiff base

Abstract : The cobalt (II) and nickel (II) complexes with H 3 L polydentate Schiff base (N[(1E) phenylmethylene N{2[2(2 {hydroxyphenylmethylene] amino} ethyl) imidazolidin-1-yl} ethylamine) were identified in water-ethanol medium (90%/10%) at 25°C at a constant ionic strength of 0.2 M by potentiometry. Sirko program was used in order to determine the number and the stability constants of the complex species formed in aqueous solution. Totally deprotonated species [ML]and protonated mononuclear species [MHL] (L= deprotonated polydentate ligand) were found in the Co(II)-H 3 L and Ni(II)-H 3 L systems. This study is completed by molecular modelling. The minimized steric energy and optimized geometry of Co(II) and Ni(II) complexes were obtained using the computer EMO program. Indeed a direct correlation was obtained between steric energies of the complexes and their formation constants.
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https://hal.univ-angers.fr/hal-03243911
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Soumis le : jeudi 3 juin 2021 - 19:14:01
Dernière modification le : vendredi 4 juin 2021 - 09:59:45
Archivage à long terme le : : samedi 4 septembre 2021 - 18:02:17

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Achour Terbouche, Safia Djebbar, Ouassini Benali-Baitich, Mustayeen A. Khan, Gilles Bouet. Stability and molecular modelling of cobalt (II) and nickel (II) with polydentate Schiff base. Revue Roumaine de Chimie, Academia Romana, 2008, 53 (2), pp.101-106. ⟨hal-03243911⟩

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