Polymerization of cyclododecasiloxanes with Si-H and Si-OEt side groups by the piers-Rubinsztajn reaction

Masashi Yoshikawa, Hiroya Shiba, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Two types of cyclododecasiloxanes possessing SiH and SiOEt side groups were polymerized by the Piers-Rubinsztajn (P-R) reaction. Cyclododecasiloxane possessing both methyl and ethoxydimethylsilyl side groups (Cyclo12-Me-Si- Me2(OEt)) was synthesized by ethoxylation of cyclododecasiloxane possessing both methyl and dimethylsilyl side groups (Cyclo12-Me-SiHMe2). Cyclo12-Me-SiMe2(OEt) and Cyclo12-Me-SiHMe2 were polymerized by the P-R reaction, using B(C6F5)3 as a catalyst. The original cyclic structures were retained after the reaction without cleavage of the SiOSi bonds. Dimethylsilane elimination between two side SiHMe2 groups and the consecutive siloxane-bond formation occurred concomitantly during the main P-R reaction. The effectiveness of the P-R reaction between oligosiloxanes toward preparation of polyorganosiloxanes with well-defined architectures has been demonstrated.

    Original languageEnglish
    Pages (from-to)747-753
    Number of pages7
    JournalBulletin of the Chemical Society of Japan
    Volume91
    Issue number5
    DOIs
    Publication statusPublished - 2018 Jan 1

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    Piers
    Polymerization
    Siloxanes
    Catalysts

    Keywords

    • Cyclic siloxane
    • Cyclododecasiloxane
    • Piers-Rubinsztajn reaction

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

    Polymerization of cyclododecasiloxanes with Si-H and Si-OEt side groups by the piers-Rubinsztajn reaction. / Yoshikawa, Masashi; Shiba, Hiroya; Wada, Hiroaki; Shimojima, Atsushi; Kuroda, Kazuyuki.

    In: Bulletin of the Chemical Society of Japan, Vol. 91, No. 5, 01.01.2018, p. 747-753.

    Research output: Contribution to journalArticle

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    abstract = "Two types of cyclododecasiloxanes possessing SiH and SiOEt side groups were polymerized by the Piers-Rubinsztajn (P-R) reaction. Cyclododecasiloxane possessing both methyl and ethoxydimethylsilyl side groups (Cyclo12-Me-Si- Me2(OEt)) was synthesized by ethoxylation of cyclododecasiloxane possessing both methyl and dimethylsilyl side groups (Cyclo12-Me-SiHMe2). Cyclo12-Me-SiMe2(OEt) and Cyclo12-Me-SiHMe2 were polymerized by the P-R reaction, using B(C6F5)3 as a catalyst. The original cyclic structures were retained after the reaction without cleavage of the SiOSi bonds. Dimethylsilane elimination between two side SiHMe2 groups and the consecutive siloxane-bond formation occurred concomitantly during the main P-R reaction. The effectiveness of the P-R reaction between oligosiloxanes toward preparation of polyorganosiloxanes with well-defined architectures has been demonstrated.",
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    AU - Shiba, Hiroya

    AU - Wada, Hiroaki

    AU - Shimojima, Atsushi

    AU - Kuroda, Kazuyuki

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    AB - Two types of cyclododecasiloxanes possessing SiH and SiOEt side groups were polymerized by the Piers-Rubinsztajn (P-R) reaction. Cyclododecasiloxane possessing both methyl and ethoxydimethylsilyl side groups (Cyclo12-Me-Si- Me2(OEt)) was synthesized by ethoxylation of cyclododecasiloxane possessing both methyl and dimethylsilyl side groups (Cyclo12-Me-SiHMe2). Cyclo12-Me-SiMe2(OEt) and Cyclo12-Me-SiHMe2 were polymerized by the P-R reaction, using B(C6F5)3 as a catalyst. The original cyclic structures were retained after the reaction without cleavage of the SiOSi bonds. Dimethylsilane elimination between two side SiHMe2 groups and the consecutive siloxane-bond formation occurred concomitantly during the main P-R reaction. The effectiveness of the P-R reaction between oligosiloxanes toward preparation of polyorganosiloxanes with well-defined architectures has been demonstrated.

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