Abstract
An interpretation of the anodic oxidation waves of aromatic aldehydes in alkaline solution obtained with a dropping mercury electrode is presented. The corresponding carboxylate is formed in the electrode process which proceeds via an unstable mercury-containing intermediate. The material of the electrode plays a decisive role in this mechanism since the oxidizing species proper is most probably a HgO·OH (−) type particle. A linear relationship has been found between the halfwave potentials of the anodic waves of substituted benzaldehydes and the logarithm of the corresponding relative rate constants of chromic acid oxidation. A nucleophilic attack is the potential-determining step.
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