Portail documentaire Université Mohamed Khider Biskra

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Titre :	Extraction et étude de la structure des compexes du cuivre(II) avec l'acide caprique
Auteurs :	Houria Benalia, Auteur ; Djamel Barkat, Directeur de thèse
Support:	Mémoire magistere
Editeur :	Biskra [Algerie] : Université Mohamed Khider, 2012
Langues:	Français
Résumé :	This work focuses on the study of the extraction of copper(II) in sulfate media by capric acid (decanoïc acid) at different concentrations from 0.005 to 2M in the chloroform at 25°C. The stoichiometry and structure of complex extracts were determined by the slope method and by UV-Visible spectroscopy. The extracted organometallic complexes into the organic phase are of the type: - CuL2.2HL: of monomeric structure and octahedral geometry. - (CuL2.HL)2: of dimeric structure and octahedral geometry. The extraction equilibria for the two types of complexes are: K12 Cu (CuL2.2HL)org + 2H 2+ + 2 (HL)2,org log Kex(12) = -7.31. K21 2 Cu (CuL2.HL)2,org + 4H 2+ + 3 (HL)2,org log K ex(21) = -14. - At low concentrations of capric acid (0.005-0.08M), the monomeric complex extracted is CuL2.2HL. - When the concentration of capric acid is 0.2M, both monomeric and dimeric forms of complex are in equilibrium in the organic phase according to the following equilibrium: 2 (CuL2.2HL)org (CuL2.HL)2,org + (HL)2,org Kdim - At high concentrations of capric acid (0.4-2M), the dimeric complex extracted is (CuL2.HL)2.

Cote	Support	Localisation	Disponibilité	Emplacement
TH/1450	Mémoire magistere	Bibliothèque centrale El Allia	Exclu du prêt	Salle de consultation
TH/1450	Mémoire magistere	Bibliothèque centrale El Allia	Exclu du prêt	Salle de consultation
TH/1450	Mémoire magistere	Bibliothèque centrale El Allia	Exclu du prêt	Salle de consultation