Complex formation between iron(III) and some substituted salicylic acids

M. V. Park

    Research output: Contribution to journalArticle

    Abstract

    The complexes formed by salicyluric acid and several substituted derivatives of salicylic acid with ferric ions have been investigated at 25°and in a medium of ionic strength 0·1 using pH and oxidation-potential measurements. The equilibrium constants of complex formation of the 1: 1 and 1: 2 mole ratio iron (III)-acid complexes formed are discussed with reference to the inductive, mesomeric, and steric effects of substituents. Appoximate values of the constants for the 1: 3 complexes of some of the acids were also obtained, and evidence indicating the possible presence of a protonated 1: 1 complex is reported.

    Original languageEnglish
    Pages (from-to)816-820
    Number of pages5
    JournalJournal of the Chemical Society A: Inorganic, Physical, Theoretical
    DOIs
    Publication statusPublished - 1966

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    Salicylates
    Iron
    Acids
    Salicylic Acid
    Equilibrium constants
    Ionic strength
    Ions
    Derivatives
    Oxidation
    salicylurate

    Cite this

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    AB - The complexes formed by salicyluric acid and several substituted derivatives of salicylic acid with ferric ions have been investigated at 25°and in a medium of ionic strength 0·1 using pH and oxidation-potential measurements. The equilibrium constants of complex formation of the 1: 1 and 1: 2 mole ratio iron (III)-acid complexes formed are discussed with reference to the inductive, mesomeric, and steric effects of substituents. Appoximate values of the constants for the 1: 3 complexes of some of the acids were also obtained, and evidence indicating the possible presence of a protonated 1: 1 complex is reported.

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