- Synthesis and reactions of the β-sultone of perfluorovinylsulfonyl fluoride
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Reactions of perfluorovinylsulfonyl fluoride, CF2=CFSO2F (1), with SO3 forms the novel β-sultone cyclo (2) in good yield.Compound 2 undergoes ring-opening upon heating or reaction with fluoride ion to give F(O)C-CF(SO2F)2 (3).Hydrolysis of 3 and 2 yields the new compounds CHF(SO2F)2 (4) and HO3S-CHF-SO2F (5), respectively.
- Forohar, Farhad,DesMarteau, Darryl D.
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p. 101 - 104
(2007/10/02)
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- Process for preparing perfluoroalkenyl sulfonyl fluorides
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Described in a process for the preparation of perfluoroalkenyl sulfonyl fluorides of formula:, Rf-CF=CF-SO2F, wherein:, Rfis F or a perfluoroalkyl group of from 1 to 9 carbon atoms,comprising the contacting of a compound of formula, Rf-CF2-CF(COF)-SO2F, with a reactant selected from carbonates of metals belonging to Groups IA, IIA and IIB of the Periodic Table of Elements at a temperature of from about 150 to about 400°C.
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- Perfluoroallyl fluorosulfate and its sultone and polymers
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Hexafluoropropene is reacted with liquid sulfur trioxide in the presence of boric oxide, boron trichloride, boron trifluoride, tri(lower alkyl) borate, boron trioxychloride or boron trioxyfluoride at from 0° C. to 150° C. to form perfluoroallyl fluorosulfate and the sultone thereof. The perfluoroallyl fluorosulfate can be homopolymerized or copolymerized with various fluoroethylenes to form resins useful as ion exchange resins or catalysts. The fluorosulfate groups on the resins can be hydrolyzed to form carboxylic acid groups or various corresponding salts. The sultone of perfluoroallyl fluorosulfate can be rearranged to form β-fluorocarbonyl-β-fluorosulfonyl-trifluorethyl fluorosulfate.
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