Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Synthesis and some properties of free radicals with triple bonds


  1. 1.

    Free radicals containing triple bonds in the substituents, tris-(p-tolanyl)methyl (I) and diphenyl-(p-phenylethynyl) phenylmethyl (II), were produced.

  2. 2.

    The EPR spectra of the radicals (I) and (II) were taken and analyzed. A weak hyperfine (0.1 Gs) interaction of the unpaired electron with the protons of the far phenyl rings was detected.

  3. 3.

    Approximately 10% of the spin density of the unpaired electron is transmitted from the triphenylmethyl rings through the triple bond.

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

Literature cited

  1. 1.

    I. L. Kotlyarevskii and N. I. Popova, Izv. Akad. Nauk SSSR, Ser. Khim.,208 (1967).

  2. 2.

    O. Fisher and W. Hess, Ber.,38, 336 (1905).

  3. 3.

    H. O. Wirth and O. Königstein, Liebigs Ann. Chem.,634, 84 (1960).

  4. 4.

    D. B. Chesnut and G. J. Sloan, J. Chem. Phys.,33, 637 (1960).

  5. 5.

    R. D. Stephens and C. E. Castro, J. Organ. Chem.,28, 3313 (1963).

  6. 6.

    E. F. Pratt and S. P. Suskind, J. Organ. Chem.,28, 638 (1963).

Download references

Author information

Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2424–2430, November, 1969.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Popova, N.I., Skubnevskaya, G.I., Molin, Y.N. et al. Synthesis and some properties of free radicals with triple bonds. Russ Chem Bull 18, 2271–2275 (1969).

Download citation


  • Methyl
  • Free Radical
  • Phenyl
  • Phenyl Ring
  • Spin Density