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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 16, Number 2
BKCSDE 16(2)
February 20, 1995 

Dehydrogenative Polymerization of New Alkylsilanes Catalyzed by Cp2MCl2/Red-Al System (M=Ti, Hf)
Hee-Gweon Woo*, Sook-Yeon Kim, Eun Jeong Cho, Il Nam Jung*
Substituted 3-phenyl-1-silabutanes, 3-chlorophenyl-1-silabutane (1), 3-tolyl-1-silabutane (2), and 3-phenoxyphenyl-1-silabutane (3), were prepared in 68-98% yield by reduction of the corresponding substituted 3-phenyl-1,1-dichloro-1-silabutanes with LiAlH4. The dehydrogenative homopolymerization and copolymerization of the silanes were performed with Cp2MCl2/Red-Al (M=Ti, Hf) catalyst system. The molecular weights of the resulting polymers were in the of range 600 to 1100 (vs polystyrene) with degree of polymerization (DP) of 5 to 8 and polydispersity index (PDI) of 1.6 to 3.8. The monomer silanes underwent the dehydrogenative polymerization with Cp2TiCl2/Red-Al catalyst to produce somewhat higher molecular weight polysilanes compared with Cp2HfCl2/Red-Al catalyst.
138 - 143
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