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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3884-3897 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1H-n.m.r. Studies on the Rotational Isomerism in the Vinylcyclopropane System, I A Modified Karplus-CurveUsing model compounds, a modified Karplus-curve for the angular dependence of the vicinal H,H coupling constant over the single bond between three membered ring and double bond in vinylcyclopropane is derived. The relation\documentclass{article}\pagestyle{empty}\begin{document}$$ 3J\; = \;5.0\; - \;1.8\;{\rm cos}\;\Phi \;{\rm + }\;{\rm 4}{\rm.3}\;{\rm cos}\;{\rm 2}\;\Phi $$\end{document}fits the experimental data best. CNDO/2 calculations confirm this result.
    Notes: Mit Hilfe von Modellverbindungen wird eine modifizierte Karplus-Kurve für die Dieder-winkel-Abhängigkeit der vicinalen H,H-Kopplungskonstanten über die C—C-Einfach-bindung zwischen Dreiring und Doppelbindung im Vinylcyclopropan abgeleitet. Die Beziehung\documentclass{article}\pagestyle{empty}\begin{document}$$ 3J\; = \;5.0\; - \;1.8\;{\rm cos}\;\Phi \;{\rm + }\;{\rm 4}{\rm.3}\;{\rm cos}\;{\rm 2}\;\Phi $$\end{document}wird den experimentellen Befunden am besten gerecht. CNDO/2-Rechnungen bestätigen dieses Ergebnis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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