Some problems of the kinetics of the hydrogenolysis of cyclopentane hydrocarbons on platinized charcoal

Communication 3. Selectivity of the hydrogenolysis of 1,2- and 1,3-dimethylcyclopentanes under conditions of a pulsed system and a flow-type method
  • O. V. Bragin
  • T. G. Olfer'eva
  • A. V. Kazanskaya-Koperina
  • A. L. Liberman
Physical Chemistry
  • 15 Downloads

Conclusions

  1. 1.

    The kinetics of the hydrogenolysis of cis-1,3-dimethylcyclopentane in the presence of platinized charcoal was studied.

     
  2. 2.

    The value of the apparent activation energy of the hydrogenolysis of cis-1,3-dimethylcyclopentane practically does not differ from the corresponding values for cyclopentane and its other homologs. The activation energies of the hydrogenolysis of 1,3-dimethylcyclopentane at various bonds of the ring vary in the interval 36.5–43 kcal/mole.

     
  3. 3.

    In 1,3-dimethylcyclopentane, the bonds of the ring situated on both sides of the carbon carrying the methyl group are broken with different ease and with different activation energies; an explanation based on conformational concepts has been proposed for this.

     
  4. 4.

    A study of the previously observed change in the selectivity of the hydrogenolysis of the fivemembered ring in the transition from a flow-type system to a pulsed system was continued with 1,2- and 1,3-diemthylcyclopentanes as examples.

     

Keywords

Methyl Activation Energy Hydrocarbon Charcoal Apparent Activation Energy 

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Copyright information

© Consultants Bureau 1971

Authors and Affiliations

  • O. V. Bragin
    • 1
  • T. G. Olfer'eva
    • 1
  • A. V. Kazanskaya-Koperina
    • 1
  • A. L. Liberman
    • 1
  1. 1.N. D. Zelinskii Institute of Organic ChemistryAcademy of Sciences of the USSRUSSR

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