Treatment of tetraalkoxysilanes with Amberlyst 15 cation-exchange resin in presence of hexamethyldisiloxane.

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概要

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• Tetraalkoxysilanes were treated with Amberlyst 15 cation-exchange resin in hexamethyldisiloxane at 40 °C in order to substitute the trimethylsilyl group for the alkyl group in a tetraalkoxysilane partially. Tetramethoxy-, ethoxy-, propoxy-, and butoxysilanes were used for the experiments. After the treatment, SiO<SUB>4</SUB>R<SUB>4−<I>n</I></SUB>X<I><SUB>n</SUB></I>(1≤<I>n</I>≤4, R=CH<SUB>3</SUB>, C<SUB>2</SUB>H<SUB>5</SUB>, <I>n</I>-C<SUB>3</SUB>H<SUB>7</SUB>, and <I>n</I>-C<SUB>4</SUB>H<SUB>9</SUB>, X=Si(CH<SUB>3</SUB>)<SUB>3</SUB>) were detected by gas chromatography and were identified by combined gas chromatography-mass spectrometry. The degree of trimethylsilylation of tetraalkoxysilane changed with the molar ratio of hexamethyldisiloxane to tetraalkoxysilane and quantities of the reaction products in the system depended mainly on the ratio.

• 公益社団法人 日本化学会の論文

著者

• Sakka Sumio

  Institute For Chemical Research Kyoto University

• Hasegawa Isao

  Institute for Chemical Research, Kyoto University

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