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Keywords:

  • hydrogen transfer;
  • polycarbosilanes;
  • polymerization;
  • radicals;
  • silenes

Abstract

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The silene (Me3Si)2Si[DOUBLE BOND]Ad is polymerized to produce a polycarbosilane with an unusual Si[BOND]Si[BOND]C repeating backbone, rather than the Si[BOND]C or Si[BOND]Si[BOND]C[BOND]C units expected for olefinic radical polymerization. The polymer structure and the polymerization mechanism (see scheme) were studied by GPC, EPR, and NMR spectroscopy and by trapping experiments.