Springer Nature is making Coronavirus research free. View research | View latest news | Sign up for updates

Effect of adding K2O, Rb2O, or Cs2O on catalytic transformations of 1,3, 5-hexatriene and 1,5-hexadiene in the presence of γ-Al2O3

  • 19 Accesses

Conclusions

  1. 1.

    The addition of an alkaline additive toγ-Al2O3 increases the yield of benzene from 1,3,5-hexatriene and 1,5-hexadiene. The yield of benzene from the hexadiene increases with increase in the basicity of the additive in the series: K2O, Rb2O, Cs2O, i.e., it enhances the dehydrocyclizing effect of the catalyst.

  2. 2.

    An increase in the basicity of the additive increases the yield of hexadienes from 1,3,5-hexatriene, and of hexenes from 1,5-hexadiene, i.e., it enhances the hydrogenating capacity of the catalyst.

  3. 3.

    The catalytic C5-cyclization of 1,3,5-hexatriene is suppressed completely, while that of 1,5-hexadiene is reduced sharply, when an alkaline additive is added toγ-Al2O3. The yield of methylcyclopentenes from 1,5-hexadiene is increased somewhat when the K2O in the catalyst is replaced by Rb2O or Cs2O.

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

Literature cited

  1. 1.

    B. A. Kazanskii, M. I. Rozengart, V. L. Polinin, and V. G. Bryukhanov, Dokl. Akad. Nauk SSSR,212, 634 (1973).

  2. 2.

    M. I. Rozengart, V. L. Polinin, V. G. Bryukhanov, and B. A. Kazanskii, Dokl. Akad. Nauk SSSR,202, 608 (1973).

  3. 3.

    Yu. V. Fomichev, I. V. Gostunskaya, and B. A. Kazanskii, Izv. Akad. Nauk SSSR, Ser. Khim., 1112 (1968).

  4. 4.

    Yu. V. Fomichev, I. V. Gostunskaya, and B. A. Kazanskii, Dokl. Akad. Nauk SSSR,177, 138 (1967).

Download references

Author information

Additional information

Deceased.

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1894–1897, August, 1974.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Rozengart, M.I., Bryukhanov, V.G., Polinin, V.L. et al. Effect of adding K2O, Rb2O, or Cs2O on catalytic transformations of 1,3, 5-hexatriene and 1,5-hexadiene in the presence of γ-Al2O3 . Russ Chem Bull 23, 1819–1821 (1974). https://doi.org/10.1007/BF00923223

Download citation

Keywords

  • Benzene
  • Hexenes
  • Additive Increase
  • Cs2O
  • Rb2O