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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 534 (1986), S. 199-205 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chelates of 8-Quinolinol Derivatives. VIII. Acid and Complex Stability Constants of Alkyl and Alkenyl Substituted 8-QuinolinolsFor a series of 7-substituted alkyl and alkenyl 8-quinolinols as well as 2-, 5-, and 7-methyl-8-quinolinols the acid constants and the stability constants of the nickel and zinc chelates were determined potentiometrically in 75 vol-% dioxane-water mixture. Methyl groups, as expected, increase the basicity of both donor atoms of the 8-quinolinols, whereas alkyl substituents in 7-position cause a decrease in basicity of the quinoline N-atom. The influence of substituents on the complex stability is only small.
    Notes: Für eine Reihe 7-substituierter Alkyl- bzw. Alkenylchinolin-8-ole sowie der isomeren 2-, 5- und 7-Methylchinolin-8-ole wurden auf potentiometrischem Wege in 75 Vol.-% Dioxan-Wasser-Mischung die Säurekonstanten und die Komplexstabilitätskonstanten der Nickel-und Zinkchelate bestimmt. Methylsubstituenten erhöhen erwartungsgemäß die Basizität beider Donoratome des Chinolin-8-ols, Alkylgruppen in 7-Position verursachen dagegen eine Abnahme der Basizität des Chinolinstickstoffs. Der Substituenteneinfluß auf die Komplexstabilität ist nur gering.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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