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Synthesis and properties of bifunctional decaorganylcyclohexasiloxanes

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  1. 1.

    Stepwise condensation of organyltrichlorosilanes with 1,3-dihydroxytetraorganyldisiloxanes affords 2,8-dichlorodecaorganylcyclohexasiloxanes, the dihydroxy derivatives of which have been separated into the cis and trans isomers.

  2. 2.

    All the cis-2,8-dihydroxydecaorganylcyclohexasiloxanes, irrespective of the substituants on the silicon atoms either in the diorganylsiloxane moiety or bonded to the functional group, undergo intramolecular cyclization to give decaorganylbicyclo[5.5.1]hexasiloxanes as a result of transannular interaction of the substituants at silicon atoms 2 and 8.

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Literature cited

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    N. N. Makarova, I. M. Petrova, Yu. K. Godovskii, B. D. Lavrukhin, and A. A. Zhdanov, Dokl. Akad. Nauk SSSR,269, 1369 (1983).

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    T. V. Timofeeva, N. N. Makarova, I. L. Dubchak, and Yu. T. Struchkov, Izv. Akad. Nauk SSSR, Ser. Khim., 1871 (1984).

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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1114–1121, May, 1985.

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Makarova, N.N., Lavrukhin, B.D., Timofeeva, T.V. et al. Synthesis and properties of bifunctional decaorganylcyclohexasiloxanes. Russ Chem Bull 34, 1017–1023 (1985). https://doi.org/10.1007/BF01142794

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  • Silicon
  • Silicon Atom
  • Trans Isomer
  • Dihydroxy
  • Intramolecular Cyclization