A photo-oxidation of croconic acid into oxalic acid

Croconic acid, H 2 C 5 O 5 , is readily oxidized. This may be attested by decolorization of the solutions and by observation of oxalic acid complexes. The oxidation products are identified by 13 C NMR spectroscopy as oxalic and mesoxalic acids, and experimental conditions are specified. The oxidatio...

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Bibliographic Details
Published in:Canadian journal of chemistry 1995-08, Vol.73 (8), p.1298-1304
Main Authors: Fabre, Paul-Louis, Castan, Paule, Deguenon, Diane, Paillous, Nicole
Format: Article
Language:English
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Summary:Croconic acid, H 2 C 5 O 5 , is readily oxidized. This may be attested by decolorization of the solutions and by observation of oxalic acid complexes. The oxidation products are identified by 13 C NMR spectroscopy as oxalic and mesoxalic acids, and experimental conditions are specified. The oxidation process requires dioxygen and photons. In parallel, the electrochemical oxidation of croconic acid is studied in aqueous media and in acetonitrile. A potential-pH diagram is drawn. Keywords: croconic acid, oxalic acid, oxidation, electrochemistry, photochemistry.
ISSN:0008-4042
1480-3291
DOI:10.1139/v95-160