Oxydation anodique de iodoperfluoroalcanes dans les acides perfluoroalcanesulfoniques. Preparation de nouveaux esters sulfoniques totalement fluores RFSO3R'F a longues chaines |
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| Authors: | A Germain A Commeyras |
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| Institution: | Laboratoire de Chimie Organique, E.R.A. N° 555, Université des Sciences et Techniques du Languedoc. Place E. Bataillon, 34060—Montpellier Cédex, France |
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| Abstract: | Perfluorinated sulphonic esters RFSO3R'F and fluorosulphates FSO3R'F, are easily obtained by anodic oxidation of iodoperfluoroalkanes R'FI in perfluoroalkane sulphonic acids RFSO3H (RF CF3, C2F5, C4F9) and fluorosulphuric acid. With di-iodo compound I(CF2)4I, the mono and the diester can be selectively obtained. The alkaline hydrolysis of these esters produces perfluorinated carboxylic compounds. Polyfluorinated iodide R'FCH2CH2I are also oxidized in similar conditions. The mechanism of the electrolytic reaction is discussed. |
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