Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 1977 - 1979 (1991)
Update date:2022-07-30
Topics:
Podol'skii, A. V.
Khonina, T. G.
Filyakova, T. I.
Kachalkova, M. I.
Kodess, M. I.
Thermal decarboxylation of potassium salts of perfluorocarboxylic acids in the presence of 20 mole percent of crown ethers takes place in 1 h at 180 deg C and gives internal perfluoroolefins in yields of up to 95percent.The predominance in product mixtures of isomers whose double bond is adjacent to the trifluoromethyl group is associated with kinetic control of the reaction.The kinetic parameters of the process have been found and the relative activities of a series of crown ethers have been established.A scheme is advanced to show their influence on the reaction studied.
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