Online ISSN : 2436-7338
Print ISSN : 0289-7709
Volume 40, Issue 5
Displaying 1-2 of 2 articles from this issue
  • Iori Abe, Yohei Sato, Ryohei Hayami, Kazuki Yamamoto, Satoru Tsukada, ...
    2022 Volume 40 Issue 5 Pages 39-46
    Published: October 25, 2022
    Released on J-STAGE: December 12, 2023

    Oxidation reaction of hydrosilane catalyzed by Wilkinson’s catalyst can produce hetero-disiloxane compounds. Herein, we investigated the kinetic constants of the reaction of triethoxysilane with oxygen in the presence of Wilkinson’s catalyst at 100 °C in toluene. The kinetic rate constants of elemental reactions, which are expected in this reaction system, were evaluated to reproduce the time-dependent variation of peak areas in gas chromatography. The rate constant of silanol-formation via oxidation reaction of TES was estimated to be 0.045 L1/2 mol−1/2 min−1. The rate constant was smaller than that of general aqueous hydrolysis reaction of alkoxysilane. The rate constants of alkoxy-silanol and silanol-silanol condensations were 0.12 and 0.08 L mol−1 min−1, respectively. The silanol-formation reaction was estimated to be the rate-determining reaction to form pentaethoxydisiloxane as a major product. The side-reactions to form 1,1,3,3-tetraethoxydisiloxane and hexaethoxydisiloxane were found to be suppressed by the formation of water in small amount.

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