• Electrochemical reduction of copper(II) galacturonate

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    • Keywords


      Electrochemical studies; polarography; cyclic voltammetry; stability constant; copper(II)a-and β-galacturonate

    • Abstract


      The complexes formed in the interaction between copper(II) anda-andβ-galacturonic acid, in the pH range 2.5–11.0, have been investigated by means of d.c. polarography and cyclic voltammetry. Witha-galacturonic acid, no complex is formed with copper up to pH 6. Between pH 6 and about 9.5, a complex is formed in solution. Above pH 9.5, the complex appears to break up releasing the ligand. In the case of β-galacturanic acid, no complex is formed until pH 3.5, and persists in solution up to a pH of about 9.5. A second complex forms above pH 6.9 and co-exists with the first complex up to pH 9.5. The complexes formed with both forms of galacturonic acid were studied and the stability constant of the coppera-galacturonate determined.

    • Author Affiliations


      Robert Payne1 Robert J Magee1

      1. Department of Inorganic and Analytical Chemistry, La Tiobe University, Bundoora, Melbourne, Victoria - 308, Australia
    • Dates

  • Journal of Chemical Sciences | News

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