Pulse radiolytic investigations of the redox system alloxan-dialuric acid: evidence for a radical intermediate |
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| Authors: | C Houée-Levin M Gardès-Albert C Ferradini J Pucheault |
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| Institution: | Laboratoire de Chimie-Physique, Université Descartes, 45, rue des Sts-Pères 75270 Paris Cedex 06, France |
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| Abstract: | The reduction of alloxan (A) into dialuric acid (AH2) by?COO? radical has been investigated by pulse-radiolysis. A radical intermediate ?AH is shown to be formed with a rate constant k (?COO? + A) = 3.2 × 107 M?1 s?1. ?AH absorption spectrum is given. This radical disappears by disproportionation leading to dialuric acid, with a rate constant 2 k = 1.6 × 108 M?1s?1. |
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