The cationic ring-opening polymerization of
cyclic pentacoodinate sila[1]ferrocenophanes was carried
out in dichloromethane to give poly(ferrocenylsilanes)
having pentacoordinate silicon moieties in the polymer
backbone. The silyl cation gave the best results as an
initiator for the polymerization, affording pentacoordinate poly(ferrocenylsilane) (M
w is 9.0 × 103) in high
yields.
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