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  • 1970-1974  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 4 (1972), S. 651-665 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The deprotonation of N-methylpiperidinium salts BHa⊕, observed by means of the coalescence of the N-methyl doublet, is operated either by OH⊖, or by the conjugate base B. The action of OH⊖ is predominant as the steric hindrance increases around Ha and is twice as fast in the axial direction.
    Notes: La déprotonation de sels de N-méthylpipéridinium BHa⊕, observé par la coalescence du doublet N-méthylique en RMN, s'effecute soit par OH⊖ (k1 ∼ 1010 M-1 s-1), soit par la base conjugée B (k2 ∼ 108 M-1 s-1). L'action de OH⊖ est prédominante lorsque croi' l'encombrement stérique autour de Ha, et a lieu 2 fois plus facilement en direction axiale.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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