New approach to the synthesis of linear and cyclic vinyl(alkoxy)siloxanes |
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| Authors: | S V Basenko A A Mailyan |
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| Institution: | 1.Favorskii Irkutsk Institute of Chemistry, Siberian Branch,Russian Academy of Sciences,Irkutsk,Russia |
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| Abstract: | Main products of the reaction of vinyltrichlorosilane VinSiCl3 with DMSO in the medium of tetra-(alkoxy)silane are linear siloxanes (RO)3SiOSiVin(OR)]OSi(OR)3, ROVin(RO)SiO] n Si(OR)3 (R = Me, Et, n = 0–2) and the hitherto unknown cyclic siloxanes Vin(RO)SiO] m (RO)2SiO]4–m (m = 1–3) formed in the ratio of 70: 30%. A tentative scheme of their formation is suggested with participation of the products of the alkoxy groups exchange between vinyl(alkoxy)dichloro-, vinyldi(alkoxy)chloro-, trialkoxychloro-, and dialkoxydichlorosilanes. |
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