Advertisement

Mass spectrometric study of vacuum pyrolysis of perfluoroolefins

  • N. D. Kagramanov
  • P. S. Zuev
  • A. A. Kutin
  • I. O. Bragilevskii
  • A. K. Mal'tsev
  • O. M. Nefedov
Physical Chemistry

Conclusions

  1. 1.

    The primary products of vacuum pyrolysis of tetrafluoroethylene, hexafluoropropene, pentafluoro-2-chloropropene, octafluoroisobutene, octafluorobutene-1, octafluorobutene-2, and perfluoro-2,3-dimethylbutene were studied by mass spectrometry.

     
  2. 2.

    The coincidence of the basic fragmentary ions in the mass spectra of perfluoropropene, pentafluoro-2-chloropropene, perfluorobutenes, and perfluoro-2,3-dimethylbutene with the primary products of their vacuum pyrolysis indicates the absence of rearrangements of the molecular radical cations contained as substituents at the double bond of the F atom or CF3 group and permits predicting the primary act of thermal decomposition of perfluoroolefins with the mass spectra obtained with a low ionizing voltage.

     
  3. 3.

    The fragmentation changes in the low-energy mass spectra of hexafluoropropene, pentafluoro-2-chloropropene, and perfluoroisobutene confirmed that not olefin-carbene isomerization, but their decomposition, which takes place with the possible participation of 1,3-biradicals, is the predominant process with an increase in the temperature in conditions of vacuum pyrolysis.

     

Keywords

Mass Spectrum Thermal Decomposition Radical Cation Tetrafluoroethylene Molecular Radical 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. 1.
    A. K. Mal'tsev, P. S. Zuev, and O. M. Nefedov, Izv. Akad. Nauk SSSR, Ser. Khim., 957 (1985).Google Scholar
  2. 2.
    F. Li, L. Wang, Q. Bi, et al., Youji Huaxue, 244 (1985); Chem. Abstrs.,103, 177830s (1985).Google Scholar
  3. 3.
    M. B. Lipkind, S. F. Politanskii, N. V. Volchkov, and O. M. Nefedov, Proceedings of the 5th All-Union Conference on Chemistry of Organofluorine Compounds [in Russian], Moscow (1986), p. 105.Google Scholar
  4. 4.
    I. D. Kushina, M. U. Fedurtsa, V. M. Gida, and V. G. Barabanov, Proceedings of the 5th All-Union Conference on Chemistry of Organofluorine Compounds [in Russian], Moscow (1986), p. 146.Google Scholar
  5. 5.
    N. N. Buravtsev, A. S. Grigor'ev, and Yu. A. Kolbanovskii, Proceedings of the 4th All-Union Conference on Carbene Chemistry [in Russian], Moscow (1987), p. 118.Google Scholar
  6. 6.
    N. D. Kagramanov, A. K. Mal'tsev, M. Yu. Dubinskii, and O. M. Nefedov, Izv. Akad. Nauk SSSR, Ser. Khim., 536 (1983).Google Scholar
  7. 7.
    N. D. Kagramanov, I. O. Bragilevskii, and A. K. Mal'tsev, Izv. Akad. Nauk SSSR, Ser. Khim., 1763 (1988).Google Scholar
  8. 8.
    A. Snelson, High Temp. Sci.,2, 70 (1970).Google Scholar
  9. 9.
    V. P. Glushko (ed.), Handbook of Thermal Constants [in Russian], No. 4, VINITI, Moscow (1970).Google Scholar
  10. 10.
    E. E. Siefert and Y.-H. Tang, Chem. Commun., 814 (1980); E. E. Siefert, D. D. Smith, R. E. Tricca, et al., J. Am. Chem. Soc.,103, 330 (1983).Google Scholar
  11. 11.
    V. G. Barabanov, G. V. Volkov, K. A. V'yunov, and V. P. Makoveenko, Zh. Obshch. Khim.,56, 1134 (1986).Google Scholar
  12. 12.
    W. S. Nip, M. Drouin, P. A. Hackett, and C. Willis, J. Phys. Chem.,84, 932 (1980); P. A. Hackett, C. Willis, and W. S. Nip, J. Am. Chem. Soc.,103, 682 (1981).Google Scholar
  13. 13.
    D. W. Berman, D. S. Bomse, and J. L. Beauchamp, Int. J. Mass Spectrom. Ion Phys.,39, 263 (1981); D. S. Bomse, D. W. Berman, and J. L. Beauchamp, J. Am. Chem. Soc.,103, 3967 (1981).Google Scholar
  14. 14.
    A. K. Mal'tsev, É. G. Baskir, N. D. Kagramanov, and O. M. Nefedov, Izv. Akad. Nauk SSSR, Ser. Khim., 1998 (1986).Google Scholar
  15. 15.
    P. M. Jeffers, J. Phys. Chem.,76, 2829 (1972).Google Scholar

Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • N. D. Kagramanov
    • 1
  • P. S. Zuev
    • 1
  • A. A. Kutin
    • 1
  • I. O. Bragilevskii
    • 1
  • A. K. Mal'tsev
    • 1
  • O. M. Nefedov
    • 1
  1. 1.N. D. Zelinskii Institute of Organic ChemistryAcademy of Sciences of the USSRMoscow

Personalised recommendations