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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3733-3744 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1H and 13C NMR Spectroscopic Investigations on Thioamide Derivatives; Ring Current Effect in 13C NMR SpectroscopyThe 1H and 13C NMR spectra of the thioformamides 1a-h are discussed with respect to the Z/E-isomerism caused by hindered rotation. The 1H NMR spectra of the diphenylthioacetamide derivatives 2a-h are characterized by strong anisotropy effects of the phenyl groups upon the chemical shifts of the substituents on the N atom. The 13C NMR spectra of these compounds show these ring current effects, too, especially in the chemical shifts and Z/E-splittings of the signals of the β-carbon atoms. The spectroscopic data allow the specification of the favoured conformation in compounds 2a-1.
    Notes: Die 1H- und 13C-NMR-Spektren der Thioformamide 1a-h werden hinsichtlich der durch gehinderte Rotation auftretenden Z/E-Isomerie diskutiert. Die 1H-NMR-Spektren der Diphenylthioacetamidderivate 2a-h sind gekennzeichnet durch starke Anisotropieeinflüsse der Phenylgruppen auf die chemische Verschiebung der Substituenten am Stickstoffatom. Die 13C-NMR-Spektren dieser Verbindungen zeigen diesen Anisotropieeinfluß ebenfalls, insbesondere in der chemischen Verschiebung und Z/E-Aufspaltung der Signale der β-C-Atome. Die spektroskopischen Befunde erlauben die Angabe der bevorzugten Konformation der Verbindungen 2a-1.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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