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Reaction of the configurational isomerization of certain stereoisomeric dimethylcyclanes on Rhodium/C, Osmium/C, and Platinum/C catalysts

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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    We have compared the catalytic properties of Rh/C, Os/C, and Pt/C in the configurational isomerization of cis-1, 2-, trans-1, 3-, and cis-1, 4-dimethylcylohexanes and cis- and trans-1, 2-dimethylcyclopentanes in a flow-type system and under pulsed conditions.

  2. 2.

    We have studied the kinetic characteristics of the configurational isomerization of cis-1, 4- and trans-1, 3-dimethylcyclohexanes on Rh/C and also cis-1, 4-dimethylcyclohexane and trans-1, 2-dimethylcyclopentane on Os/C in a flow-type system. The order of the reaction with respect to the hydro-carbon and the apparent activation energies are considerably greater for the cyclopentane hydrocarbons than for the cyclohexanes. On the Os/C catalyst the activation energies of the configurational isomerization are considerably higher than on Rh/C. The relative disposition of the alkyl groups in the 1, 2-,1, 3- and 1,4-dimethylcyclohexanes has no influence on the values of the activation energies.

  3. 3.

    The results indicate that the configurational isomerization of stereoisomeric dialkylcyclohexanes takes place on Rh/C in the same way as on Pt/C, in accordance with an associate mechanism of the SN2 type.

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Authors and Affiliations

  1. N. D. Zelinskii Institute of Organic Chemistry, Academy of Sciences of the USSR, Moscow

    O. V. Bragin, V. G. Tovmasyan, D. B. Furman & A. L. Liberman

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  1. O. V. Bragin
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  2. V. G. Tovmasyan
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  3. D. B. Furman
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  4. A. L. Liberman
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 32–36, January, 1976.

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Bragin, O.V., Tovmasyan, V.G., Furman, D.B. et al. Reaction of the configurational isomerization of certain stereoisomeric dimethylcyclanes on Rhodium/C, Osmium/C, and Platinum/C catalysts. Russ Chem Bull 25, 23–27 (1976). https://doi.org/10.1007/BF00925611

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  • DOI: https://doi.org/10.1007/BF00925611

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