Réactions dans le sulfolane. II. Etude électrochimique de systèmes oxydo-réducteurs des halogènes
Open Access
- 15 April 1968
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 46 (8) , 1261-1266
- https://doi.org/10.1139/v68-212
Abstract
The electrochemical oxidation of halides and reduction of halogens have been studied in sulfolane, an aprotic solvent. Stable trihalide ions X3− are formed. The formation constants K of these X3− ions have been determined by potentiometry as 107.4 (X = I), 106.8 (X = Br), and 1031(X = Cl) in a 0.1 M LiClO4 medium. The values of the constants K have also been obtained in methanol, a hydroxylic solvent, 104.2 (X = I), 102.3 (X = Br), and in mixtures of both solvents (X = I). The variations of solvation energies of X3− and X− ions from one solvent to the other were estimated by means of a ferrocene electrode.Keywords
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