Radical polymerization of the silene (Me3Si)2Si=CR2 by hydrogen transfer from a trimethylsilyl group.
The silene (Me(3)Si)(2)Si=Ad is polymerized to produce a polycarbosilane with an unusual Si-Si-C repeating backbone, rather than the Si-C or Si-Si-C-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.
Bravo-Zhivotovskii
Dmitry
D
Shulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel. chrbrzh@tx.technion.ac.il
Melamed
Semyon
S
Molev
Victoria
V
Sigal
Nadejda
N
Tumanskii
Boris
B
Botoshansky
Mark
M
Molev
Gregory
G
Apeloig
Yitzhak
Y