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Titel: Reactions of trimethylsilylated silicate anions in acidic medium. - Part 1 : Effect of amberlyst 15 Cation-exchange resin on the products of trimethylsilylation of hexameric ring silicates
Verfasser: Garzó, Gabriella
Vargha, Anna
Székely, Tamás
Hoebbel, Dagobert
Sprache: Englisch
Erscheinungsjahr: 1980
Quelle: Journal of the Chemical Society / Dalton transactions. - 1980, S. 2068-2074
SWD-Schlagwörter: Silicate
Anion
Verallgemeinerte Ableitung
Gaschromatographie
DDC-Sachgruppe: 540 Chemie
Dokumentart : Journalartikel
Kurzfassung: Chemical and structural transformations induced by proton-donor catalysts (Amberlyst 15 cation-exchange resin and trichloroacetic acid) have been studied using the silicate derivatives Si6O15(SiMe 3)6 and Si6O18(SiMe 3)12 as model compounds. The experiments were performed in hexamethyldisiloxane solutions using a standard quality Amberlyst 15. Gas chromatography with a glass capillary column was used for detection of the composition changes in the reaction mixtures. Present and former results have permitted a probable structural presentation of the reaction pathways to be made. The transformations tend to produce structures containing only tetrameric siloxane rings when starting from cyclic and polycyclic silicate derivatives containing trimeric, (pentameric), or hexameric siloxane rings. Three different reaction types are suggested for the interpretation of the transformations. Amberlyst 15 was found to contribute significantly to side reactions during the Amberlyst treatment following the trimethylsilylation of silicates under the usual conditions employed.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-19188
hdl:20.500.11880/23971
http://dx.doi.org/10.22028/D291-23915
SciDok-Publikation: 10-Dez-2008
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
SE - Sonstige Einrichtungen

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