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  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 6 (1974), S. 66-72 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Long range 5J(FH) and 6J(FH) couplings were observed for silanes of the type (C6F5)nSiR4-n (n = 1, 2, 3; R = alkyl, aryl) and disilanes C6F5[Si(CH3)2]2R (R = CH3, C6F5). A characteristic increase in line width for 19F-NMR spectra of (C6F5)nSiR4-n(n ≧ 2) is thought to be due to spin systems of the type ([AC]2B)n or ([AX]2M)n with intra-annular couplings between ortho-fluorine atoms of neighbouring ring systems.
    Notes: Longrange-Kopplungen des Typs 5J(FH) und 6J(FH) werden bei Silanen des Typs (C6F5)nSiR4-n (n = 1, 2, 3; R = Alkyl, Aryl) sowie den Disilanen C6F5[Si(CH3)2]2R (R = CH3, C6F5) beobachtet. Eine typische Linienverbreiterung der Fluor-resonanzspektren von (C6F5)nSiR4-n (n ≧ 2) wird auf Spinsysteme des Typs ([AC]2B)n bzw. ([AX]2M)n mit interanularen Kopplungen der ortho-Fluor-atome benachbarter Ringe zurückgeführt.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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