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The photochemical oxidation of ascorbic acid in solutions containing oxalic acid. II.—Mechanism of the reaction

✍ Scribed by L. H. Lampitt; L. C. Baker; E. Wittenberg

Publisher
John Wiley and Sons
Year
1956
Tongue
English
Weight
396 KB
Volume
7
Category
Article
ISSN
0022-5142

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✦ Synopsis

Abstract

Ascorbic acid is not oxidized (thermally) by ferric salts in oxalic acid solution. When ferric salts in oxalic acid solution are irradiated in an atmosphere of nitrogen, ferrous ions are produced; in an atmosphere of air, ferrous ions are produced when the ratio of iron to oxalate exceeds a certain value. It is suggested that the photochemical oxidation of ascorbic acid is due to the activity of the free radicals formed in solution on autoxidation of the ferrous ions produced by the photochemical reduction of ferri‐oxalate.

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