Perfluorobutanesulfonic acid

Analogously, tnflic acid isomerizes n-butane into 2 methylpropane [80, 81] Interestingly, perfluorobutanesulfonic acid, which is of similar strength as tnflic acid, does not catalyze the isomerization of n-butane [50]... 

New Soluble Catalysts. Trifluoromethansulfonic acid (triflic acid, TfOH)42 and acyl triflates, that is mixed anhydrides of carboxylic acids and triflic acid,43 44 were first reported to be effective for Friedel-Crafts acylation in 1972. Significantly lower yields (<30%) were obtained with other Brpnsted acids. High activities were also observed for perfluorobutanesulfonic acid.37... 

It has not been possible to measure the acidity of the CF3S03H-SbFs system by spectrophotometry because of its very strong absorption in the UV-visible spectrum. In comparison with the strength of the related perfluoroalkanesulfonic acids, its acidity should be very close or slightly higher (by 1 H0 unit) than the acidity of the perfluoroethane- and perfluorobutanesulfonic acid-SbF5 mixtures, which was... 

Effenberger and Epple347 showed that alkylbenzenes are effectively acylated when 1 % triflic acid is added to the mixture [Eq. (5.138)] (Table 5.26). It was shown that when other Brpnsted or Lewis acids were used, the yield decreased drastically (Table 5.27). Perfluorobutanesulfonic acid was found similarly effective (35-84% yields)348 [Eq. (5.138)]. 

In the preparation of mixed carboxylic-perfluoroalkane sulfonic anhydrides from the corresponding acids, water formahon is responsible for the low yields of the acylation product. By removing water from the reaction mixture by azeotropic distillation and adsorption onto molecular sieves, the yield of benzoylahon of para-xylene with BAC in the presence of perfluorobutanesulfonic acid (10% mol) is improved to 90%. 

Perfluoroammonium octanoate. See Ammonium perfluorooctanoate Perfluorobutanesulfonic acid CAS 59933-66-3... 

Perfluoro-n-butyl sulfonic acid. See Perfluorobutanesulfonic acid Perfluorobutyric acid. See Heptafluorobutyric acid... 

PEG-12 tallowamine PEG-70 tallowamine PEG-3 tallow ammonium acetate Perfluorobutanesulfonic acid Poloxamer 101 Poloxamer 105 Poloxamer 108 Poloxamer 122 Poloxamer 123 Poloxamer 124 Poloxamer 181 Poloxamer 182 Poloxamer 183 Poloxamer 184 Poloxamer 185 Poloxamer 188 Poloxamer 212 Poloxamer 215 Poloxamer 231 Poloxamer 234 Poloxamer 235 Poloxamer 237 Poloxamer 238 Poloxamer 282 Poloxamer 284 Poloxamer 288 Poloxamer 331 Poloxamer 333 Poloxamer 334 Poloxamer 335 Poloxamer 338 Poloxamer 401 Poloxamer 402 Poloxamer 403 Poloxamer 407 Polyethylene glycol Polysorbate 60 Polysorbate 61 Polysorbate 81 Polysorbate 85... 

B. Ruisinger, H. P. Boehm, Two different intercalate structures in the intercalation compounds of graphite with perfluorobutanesulfonic acid, Angew. Chem. Intemat. Ed. Engl., 26, 253-255... 

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