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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 776-797 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Imine-Enamine Tautomerism, III1). - Tautomerism of N-(Ary1)iminomethyl DisulfidesThe tautomeric equilibrium between iminomethyl disulfides 1a formed by sulfenylation of thiocarboxanilides and aminovinyl disulfides 1b is determined by the type of substitution on the β-C atom and on the nitrogen atom. Aminovinyl disulfides are stabilized by electron- withdrawing substituents on the β-C atom and by intramolecular hydrogen bonding, whereas the stability of iminomethyl disulfides is considerably enhanced by electron-with- drawing substituents on nitrogen. In the case of compounds 20-30 the influence of the aro- matic substituents on nitrogen is given by the Hammett σ-values.
    Notes: Die durch Sulfenylierung von Thiocarbonsäureaniliden erhaltenen Iminomethyldisulfide 1a stehen mit den Aminovinyldisulfiden 1b in einem Tautomeriegleichgewicht, dessen Lage substituentenabhängig ist. Elektronenziehende Gruppen am β-ständigen C-Atom und die Ausbildung intramolekularer Wasserstoffbrücken stabilisieren das Aminovinyldisulfid, während elektronenziehende Substituenten an der N-Phenylgruppe das Iminomethyldisulfid begünstigen. Für die Verbindungen 20-30 kann die Abhängigkeit der Gleichgewichtslage vom Substituenten am Stickstoffatom durch eine Hammett-Beziehung beschrieben werden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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