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Topics In Organic Polarography pp 49–56Cite as

Polarographic Reduction of Aldehydes and Ketones. II. pH-Dependence of Polarographic Limiting Currents of Aryl Alkyl Ketones Governed by the Rate of Simultaneous Reactions with Several Acids Producing the Electroactive Species

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Abstract

For reactions in which the electroactive protonated form is generated at the electrode surface not only by reaction with hydrogen ions, but also with other proton-donors, the pH-dependence of limiting currents studied in buffers with a constant concentration of the acid buffer component gives a distorted dissociation curve. The dependence has the shape of a theoretical dissociation curve only, when the concentration of the base buffer component is kept constant. The inflexion point of such curves (pK″) depends on the concentration of the base buffer component [S−] and the curve is shifted towards lower pH-values with decreasing base component concentration. From dependence of 1/(K″)2 on [S−], values of rate constants with the acid buffer component (k SH) and with hydrogen ions (k H3O+) can evaluated. Derived equations are used for the study of the one-electron wave of the protonated form of aryl alkyl ketones, in particular some deoxybenzoins.

Part I: This Journal 33, 2548 (1968).

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Author notes

  1. P. Zuman

    Present address: Department of Chemistry, University of Birmingham, Great Britain

  2. B. Turcsanyi

    Present address: Central Research Institute for Chemistry, Hungarian Academy of Sciences, Budapest, Hungary

Authors and Affiliations

  1. J. Heyrovský Institute of Polarography, Czechoslovak Academy of Sciences, Prague 1, Czech Republic

    P. Zuman & B. Turcsanyi

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  1. P. Zuman
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  2. B. Turcsanyi
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Editors and Affiliations

  1. Department of Chemistry, University of Birmingham, Birmingham, England

    P Zuman

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© 1970 Plenum Publishing Company Ltd.

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Zuman, P., Turcsanyi, B. (1970). Polarographic Reduction of Aldehydes and Ketones. II. pH-Dependence of Polarographic Limiting Currents of Aryl Alkyl Ketones Governed by the Rate of Simultaneous Reactions with Several Acids Producing the Electroactive Species. In: Zuman, P. (eds) Topics In Organic Polarography. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1812-5_4

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  • DOI: https://doi.org/10.1007/978-1-4684-1812-5_4

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-1814-9

  • Online ISBN: 978-1-4684-1812-5

  • eBook Packages: Springer Book Archive

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