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Oscillatory Oxidation of Malonic Acid by Bromate

At room temperature the chemical reaction between malonic acid (0.2 M) and KBrO3 (0.06 м) in 1 м H2SO4 is catalysed by cerium ions. The oscillation of the yellow Ce4+ ions can be observed directly during the reaction. By silica-gel chromatography the brominated products of the reaction have been identified as dibromoacetic acid and bromomalonic acid.