Skip to main content
SpringerLink
Log in

Formation of radicals in stepwise thermolysis of polyunsaturated polycarbosilane —[(Me2SiC≡C)4Me2SiCH=CH] n —

  • Published:
Russian Chemical Bulletin Aims and scope

Abstract

The onset temperature of radical formation in the stepwise thermolysis of polyunsaturated polycarbosilane —[(Me2SiC≡C)4Me2SiCH=CH] n — with n > 2 was found by ESR spectroscopy. Beginning from 230°C two types of radicals are formed. The first radical arises on heating to 240°C due to the delocalization of unpaired electrons over the polyunsaturated polymer systems to H atoms of the Et groups of the polymer. The second radical appears at temperatures ≥240°C due to delocalization to H atoms of the Me groups through the vacant 3d-orbital of the Si atom.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. L. K. Luneva, A. M. Sladkov, and V. V. Korshak, Vysokomol. Soedin., Ser. A, 1967, 9, 910 [Polym. Sci. USSR, Ser. A, 1967, 9, 910 (Engl. Transl.)].

    Google Scholar 

  2. A. M. Sladkov, Polisopryazhennye polimery [Polyconjugated Polymers], Nauka, Moscow, 1989, 128, 146 (in Russian).

    Google Scholar 

  3. J. E. Wertz and J. R. Bolton, Electron Spin Resonance, Elementary Theory and Practical Applications, McGraw Hill Book Company, New York, 1972.

    Google Scholar 

  4. N. I. Baklanova, V. H. Kulyukin, I. A. Vorsina, N. Z. Lyakhov, L. V. Zhilitskaya, O. G. Yarosh, and M. G. Voronkov, Vysokomol. Soedin., Ser. A, 2001, 43, 722 [Russ. Polym. Sci., Ser. A, 2001, 43, 722 (Engl. Transl.)].

    Google Scholar 

  5. A. Yu. Osadchev, A. I. Grigor´ev, N. A. Andreeva, V. V. Shamanin, and S. S. Skorokhodov, Vysokomol. Soedin., Ser. A, 1999, 41, 71 [Russ. Polym. Sci., Ser. A, 1999, 41, 71 (Engl. Transl.)].

    Google Scholar 

  6. H. Bock, J. Mturet, J. W. Bats, and Z. Havlas, Z. Naturforsch., 1998, 128, 145.

    Google Scholar 

  7. B. G. Ramsey, Electronic Transition in Organometalloids, Acad. Press, New York-London, 1969, 75.

    Google Scholar 

  8. P. K. Bischof, M. J. S. Dewar, D. W. Goodman, and T. B. Jones, J. Organomet. Chem., 1974, 82, 89.

    Google Scholar 

  9. A. N. Egorochkin and M. G. Voronkov, Elektronnoe stroenie soedinenii kremniya, germaniya, olova [Electron Structure of the Silicon, Germanium, and Tin Compounds], Izd-vo SO RAN, Novosibirsk, 2001, 615 pp. (in Russian).

    Google Scholar 

  10. O. G. Yarosh, G. Yu. Turkina, V. Yu. Vitkovskii, A. I. Albanov, and M. G. Voronkov, Zh. Obshch. Khim., 1988, 58, 494 [Russ. J. Gen. Chem. USSR, 1988, 58, 494 (Engl. Transl.)].

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, 18 Sovetsky prosp., 650099, Kemerovo, Russian Federation

    V. P. Berveno & L. V. Bryukhovetskaya

  2. Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 ul. Favorskogo, 664033, Irkutsk, Russian Federation

    M. I. Voronkov & O. I. Yarosh

Authors
  1. V. P. Berveno
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. L. V. Bryukhovetskaya
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. I. Voronkov
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. O. I. Yarosh
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Berveno, V.P., Bryukhovetskaya, L.V., Voronkov, M.I. et al. Formation of radicals in stepwise thermolysis of polyunsaturated polycarbosilane —[(Me2SiC≡C)4Me2SiCH=CH] n —. Russian Chemical Bulletin 52, 764–767 (2003). https://doi.org/10.1023/A:1023904116820

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1023904116820

Search

Navigation