V. Bardin, I. Shundrina, H. Frohn
2014
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0
Influential Citations
2
Citations
Journal
Journal of Fluorine Chemistry
Abstract
Abstract Potassium perfluoroalkenyl(fluoro)borates, K[R F BF 3 ], (R F = CF 2 C(CF 3 ), cis -CF 3 CF CF, and cis -C 6 F 13 CF CF) decomposed at 208–225 °C ( T max , dTG). The K[R F BF 3 ] salts (R F = C 3 F 7 , C 6 F 13 , trans -CF 3 CF CF, and trans -C 4 F 9 CF CF) decomposed at 273–312 °C ( T max , dTG). Both groups of salts formed volatile polyfluoroorganics and K[BF 4 ] as solid residue. The preparative thermolysis of selected prototypical salts K[R F BF 3 ] showed that the polyfluoroorganics consisted of a mixture of internal perfluorohexenes, C 6 F 12 , and 1-H-tridecafluorohexane, C 6 F 13 H, in case of K[C 6 F 13 BF 3 ], and of perfluorooctynes, C 8 F 14 , and cis -C 6 F 13 CF CFH in case of K[ cis -C 6 F 13 CF CFBF 3 ]. The salts K[(C 6 F 5 ) 2 BF 2 ] and K[R F BF 3 ] (R F = CF 3 C C, CF 3 CF CFC C, C 6 F 5 C C, C 6 F 5 , 2,3,5,6-C 5 NF 4 ) decomposed in the temperature range 249–337 °C ( T max , dTG) and mainly resulted in non-volatile polyfluoroorganics besides K[BF 4 ]. The reaction path of the thermolysis of perfluoroalkyl-, perfluoroalkenyl-, and perfluorophenyl(fluoro)borates is discussed and compared with that of perfluorocarboxylates.