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Preparation of substituted network polysilanes by a disproportionation reaction of alkoxydisilanes in the presence of alkoxysilanes

✍ Scribed by Keiji Kabeta; Shigeru Wakamatsu; Takafumi Imai

Book ID: 102658684
Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 668 KB
Volume: 34
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(199610)34:14<2991::aid-pola17>3.0.co;2-f

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✦ Synopsis

Network methylethoxypolysilanes containing various substituents such as hexyl, phenyl, ethylene, hexamethylene, phenylene, and thiophene groups were prepared by a disproportionation reaction of 1,1,2,2-tetraethoxy-1,2-dimethyldisilane in the presence of the corresponding substituted alkoxysilanes. The reaction was considered to proceed via a silyl anion mechanism. The silyl anion produced from a disilane or a higher homologue attacked the alkoxysilane, and that caused the alkoxysilane moiety to be introduced into the polysilane. The amount of incorporated substituents varied from 3 to 29% of all organic substituents, depending on which alkoxysilane was reacted. The electrical conductivities of some polysilanes were measured, and the polymer with thiophene groups was found to show relatively higher conductivity of Scm-' after iodine doping.

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