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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 384 (1971), S. 43-52 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By means of paperchromatographic, kinetic and X-ray methods it is shown that the tetramethylammonium silicate of the composition 1 N(CH3)4OH · 1 SiO2 · ∼8 H2O has not - as hitherto supposed - the constitution of a poly- or phyllosilicate, but that of a tetra-anhydrido-bis-cyclotetrasilicate (double-fourringsilicate), [(CH3)4N]8[Si8O20] · ∼69 H2O. Its trimethylsilylation by means of hexamethyldisiloxane gives the corresponding, crystalline trimethylsilyl ester [(CH3)3Si]8[Si8O20], which has been characterised by mass spectroscopy.
    Notes: Mit Hilfe papierchromatographischer, kinetischer und röntgenographischer Methoden wird gezeigt, daß das Tetramethylammoniumsilicat der Zusammensetzung 1 N(CH3)4OH · 1 SiO2 · ∼8 H2O nicht - wie bisher angenommen - ein Poly- oder Phyllosilicat, sondern ein Tetra-anhydrido-bis-cyclotetrasilicat (Doppelviererringsilicat) der Formel [(CH3)4N]8[Si8O20] · ∼69 H2O ist. Durch Umsatz mit Hexamethyldisiloxan wurde daraus der entsprechende Trimethylsilylester ((CH3)3Si)8[Si8O20] in kristallisierter Form erhalten.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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