Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Study on the Modes of Thermal Decomposition of Several Azo-Type Initiators

Polymer Journal volume 9, pages275–282(1977)Cite this article

Abstract

Modes of thermal decomposition reactions of several azo-type initiators were studied in the presence or absence of a transition-metal complex. Some metal complexes examined cause dramatic influence upon the relative ratio of decomposition products. Particularly, a cobalt complex prevents the coupling reaction of radicals formed from azo compounds, with increased formation of noncoupling products being observed. Futhermore no difference was observed in the mole ratios of an unsymmetrical coupling product to the sum of symmetrical products in the decomposition of an unsymmetrical azo compound with or without a complex, Co(II)(sal)2((R)-CHXDA). This phenomenon was satisfactorily explained by assuming that primary radicals immediately formed interact with the metal complex and are stabilized prior to subsequent reactions.

Download PDF

References

  1. 1

    J. Thiele and K. Heuser, Ann., 290, 1 (1896).

  2. 2

    C. G. Overberger, M. T. O’Shaughnessy, and H. Shalit, J. Am. Chem. Soc., 71, 2661 (1949).

  3. 3

    C. G. Overberger and M. B. Berenbaum, J. Am. Chem. Soc., 73, 2618 (1950).

  4. 4

    J. E. Falk, “Porphyrins and Metalloporphyrins,” Elsevier, Amsterdam, 1964.

    Google Scholar 

  5. 5

    P. Pothemund and A. R. Menotti, J. Am. Chem. Soc., 70, 1808 (1948).

  6. 6

    H. Aoi, M. Ishimori, S. Yoshikawa, and T. Tsuruta, J. Organometal. Chem., 85, 241 (1975).

  7. 7

    T. Hirano, T. Miki, and T. Tsuruta, Makromol. Chem., 104, 230 (1967).

Download references

Author information

Affiliations

  1. Department of Synthetic Chemistry, Faculty of Engineering, University of Tokyo

    Kenji Yoshino, Yasukazu Ohkatsu & Teiji Tsuruta

Authors
  1. Kenji Yoshino
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Yasukazu Ohkatsu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Teiji Tsuruta
    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

Yoshino, K., Ohkatsu, Y. & Tsuruta, T. Study on the Modes of Thermal Decomposition of Several Azo-Type Initiators. Polym J 9, 275–282 (1977). https://doi.org/10.1295/polymj.9.275

Download citation

Keywords

  • Radical Decomposition
  • Azo Compound
  • Cage
  • Organometallic Complex

Further reading

Search

Quick links