MASS SPECTROMETRY STUDY OF THE PYROLYSIS OF PERFLUOROOLEFIN OXIDES

Article abstract of DOI:10.1007/BF00961223

The pyrolysis of perfluoroolefin oxides has been studied by gas chromatography/mass spectrometry at 400-700 deg C, in a current of He (1:10 dilution, contact time 1 sec).For oxides containing terminal CF2 group, the sole degradation route is through the elimination of difluorocarbene.Pyrolysis of symmetrical disubstituted oxides results in the elimination of a perfluoroalkylfluorocarbene, which subsequently isomerizes to the corresponding perfluoroolefin.In the pyrolysis of unsymmetric disubstituted oxides the elimination of perfluoroalkylfluorocarbenes occurs by both of the possible routes.Trisubstituted oxides eliminate bis-perfluoroalkylcarbenes.The decomposition of tetrasubstituted oxides proceeds along several directions concurrently.