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  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 3 (1971), S. 187-191 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NMR spectroscopy has been used to investigate the barrier of rotation about the carbonnitrogen bond in ureas and thioureas. NMR and activation parameters are determined and compared.
    Notes: Une barrière de rotation de faible valeur autour de la liaison N—CO est mise en évidence dans les urées de formule CH3—NH—CO—NHR (R = H, CH3). Les thiourées correspondantes sont examinées afin d'étendre l'étude comparative des systèmes carbonyle-thiocarbonyle. Les paramètres RMN et les grandeurs thermodynamiques liées au processus d'isomérisation sont discutés.
    Type of Medium: Electronic Resource
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