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Consequences of acceptor effects on the polarization of oxo and imine bonds in acyl and R-CO-COOH compounds: Part III. Acid-base equilibria antecedent to the reduction of α-ketoacids at the DME by Maurice Bernard Fleury; Jacques Moiroux; Daniele Fleury; Jean-Claude Dufresne is a Chemistry article available to read on EtoBox.
What is Consequences of acceptor effects on the polarization of oxo and imine bonds in acyl and R-CO-COOH compounds: Part III. Acid-base equilibria antecedent to the reduction of α-ketoacids at the DME about?
It is usually assumed that in (x-ketoacids (R--CO--COO--), when the pH increases, the antecedent protonation occurs at the carboxylate group. A comparison of the cathode half-wave potentials and the ratio ~U~l/2/ApH as well as the , determination of Taft's polar substituents 5 ~oo" and ~J COOH lead us to postulate that, in neutral media, the recorded recombination current corresponds to antecedent protonation of the carbonyl function. The antecedent protonation of the carboxylate group only occurs in a more acid medium (1 < pH < 5). The hydrate is not reducible because its protonation, followed by hydration, only occurs at the electrode at pH lower than 1. \* For more details, see the initial paper about pyridine-aldehyde [18 ].
Who reads Consequences of acceptor effects on the polarization of oxo and imine bonds in acyl and R-CO-COOH compounds: Part III. Acid-base equilibria antecedent to the reduction of α-ketoacids at the DME?
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- Author
- Maurice Bernard Fleury; Jacques Moiroux; Daniele Fleury; Jean-Claude Dufresne
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-0728)
- Published
- 1977
- Language
- EN
- Field
- Chemistry (Physical Sciences)