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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Halogen Exchange on Silicon Halides. XIII. Structure and Reactivity of Silicon Halide-Pyridine CompoundsSiCl4 · 2 Py crystallizes in the monoclinic space group C2/m with 3 formula units per unit cell. The transoctahedral molecule has 2/m-symmetry. The bond distances Si—Cl are 218.3 pm being with it 9.2% longer as in the tetrahedral SiCl4. This bond weakening reduces the activation energy of the halogen exchange on silicon. (SiI2Py4)I2 crystallizes trigonal-rhombohedral with 3 formula units per unit cell.
    Notes: SiCl4 · 2 Py kristallisiert in der Raumgruppe C2/m mit 2 Formeleinheiten pro Elementarzelle. Das trans-oktaedrische Molekül besitzt 2/m-Symmetrie. Die Si—Cl-Abstände betragen 218,3 pm und sind damit um 9,2% länger als im tetraedrischen SiCl4. Diese Bindungsschwächung senkt die Aktivierungsenergie des Halogenaustausches am Silicium. (SiI2Py4)I2 kristallisiert trigonal-rhomboedrisch mit 3 Formeleinheiten pro Elementarzelle.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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