Darstellung und eigenschaften von octafluorbutansulfonsäure H(CF2)4SO3H und einigen ihrer derivate |
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| Authors: | H. Bürger F. Heyder G. Pawelke H. Niederprüm |
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| Affiliation: | Anorganische Chemie, FB 9, Gesamthochschule, D-5600 Wuppertal West Germany;Bayer A.G., Sparte AC, D-5090 Leverkusen West Germany |
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| Abstract: | Perfluorobutanesulfonyl fluoride C4F9SO2F, obtained by electrofluorination of sulfolene, may contain up to 10 % of perfluorotetramethylene sulfone. Upon hydrolysis with base, this sulfone yields octafluorobutanesulfonate ion H(CF2)4SOø3 (V). Perfluorobutanesulfonic acid and octafluorobutanesulfonic acid (VI) which are readily obtained from the salts and H2SO4 can be separated via fractional distillation. VI forms a crystalline monohydrate, M.P. 45°C. The trimethylsilyl ester was obtained from VI and (CH3)3 SiCl. Upon heating above 250° the K sulfonate (Vb) liberates HF. |
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