1998-56-7Relevant articles and documents
THE THERMAL ISOMERIZATION OF HEPTAFLUOROCYCLOHEXADIENES
Feast, W. J.,Morland, J. B.
, p. 57 - 74 (1981)
The evidence for the involvement of sigmatropic fluorine migrations in the isomerizations of fluorinated polyenes is reviewed and the difficulties inherent in providing satisfactory rationalizations are discussed.The thermal isomerizations of heptafluorocyclohexadienes under various reaction conditions are described.It is established that such isomerizations occur by a mechanism which does not involve catalysis by fluoride ion, however the exact mechanistic pathway remains uncertain.
THE SIGMATROPIC MIGRATION OF FLUORINE
Burdon, J.,Childs, A.,Parsons, I. W.,Rimmington, T. W.
, p. 75 - 86 (1981)
Pyrolysis of polyfluorocyclohexadienes at 475-480 deg C over new quartz or Pyrex glass gave products derived from 1,5-sigmatropic migrations of fluorine; 1,3-migrations occurred to only a small degree.As the quartz or glass aged, other processes - 1,3-migrations and defluorinations to aromatics - began to occur; these appear to be due in some way to fluoride ion, since pyrolysis over sodium fluoride gave similar products.
