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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 460 (1980), S. 228-234 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation of Anhydrous Borates from Tris(methoxy)borane and Discussion of the Reaction PathBorates and polyborates of lithium, potassium, rubidium, calcium, and strontium free from water of crystallization are prepared.The infrared, Raman, 1H- and 11B nuclear magnetic resonance spectra suggest that the slowest step in the hydrolysis of tris(methoxy) borane in the presence of metal alkoxides in organic solvents may be expressed by the equation [ROB(OH)3]- + ROB(OH)2 ⇌ [RO(HO)2BOB(OR)(OH)]- + H2O (R = CH3 or H). From this alkylated diborate triborates, tetraborates, and pentaborates are then formed by a similar condensation sequence.
    Notes: Kristallwasserfreie Borate und Polyborate mit Lithium, Kalium, Rubidium, Calcium und Strontium wurden dargestellt.Die IR-, Raman-, 1H- und 11B-NMR-Spektren dieser Verbindungen lassen vermuten, daß der langsamste Schritt bei der Hydrolyse von Tris(methoxy)boran in Gegenwart von Metallalkoxiden in organischen Lösungsmitteln durch die Gleichung [ROB(OH)3]- + ROB(OH)2 ⇌ [RO(HO)2BOB(OR)(OH)]- + H2O (R = CH3 oder H). ausgedrückt werden kann. Aus diesem alkylierten Diborat werden dann Triborate, Tetraborate und Pentaborate durch einen ähnlichen Kondensationsmechanismus gebildet.
    Type of Medium: Electronic Resource
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