Evidence for stereoregulations in the polymerisation of phenylsilane by bis (indenyl)dimethylzirconium complexes

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Abstract
Bis(indenyl)dimethylzirconocene, 1, and [1,2-bis(indenyl)ethane]dimethylzirconocene, 2, both catalyze the dehydropolymerization of phenylsilane to a mixture of low molecular weight cyclic oligosilanes (PhSiH)n (n = 6–9). The limited number of sharp resonances in the 29Si and 1H NMR spectra of the polymer produced with 2 as catalyst indicates that the catalyst exerts a significant stereoregulating influence on the polymerization. Keywords: polysilanes, catalytic dehydrocoupling, stereoregulation, bis(indenyl)zirconium complexes.

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