Abstract
1. With the aid of infrared spectra the structure of the fundamental structural unit was established for catalyticpolycondensation products obtained from α,ω-bistrimethylsilylalkanes and also for polymers obtained by the thermal polymerization of 1,1-dimethylsilacyclobutane and the catalytic polymerization of 1,1-dimethylsilacyclopentane. 2. Under the action of aluminum halides, p-bis(trimethylsilylmethyl)benzene and p-bistrimethylsilylbenzene react with liberation of tetramethylsilane and formation of sila-hydrocarbon condensation products. The latter contain alternations of silicon atoms and p-phenylenedimethylene or p-phenylene fragments in the chain.
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