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Iodine catalysis in the ceric-arsenite reaction. Role played by the chloride ion

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Summary

The iodine catalysed ceric-arsenite reaction has been studied kinetically. The reaction shows first-order characteristics only in the presence of chloride. The chloride ion also shows catalytic activity. It has been found that in the presence of chloride iodine catalysis is inhibited to some degree.

A new mechanism for the reaction is suggested.

Zusammenfassung

Die Kinetik der durch Jodid katalysierten. Cer(IV)-Arsen(III)-Reaktion wurde studiert.

Sie verläuft nur in Anwesenheit von Chloridionen als Reaktion erster Ordnung. Neben seiner eigenen katalytischen Wirkung hat das Chloridion die Eigenschaft, die Jodkatalyse zu hemmen.

Ein neuer Mechanismus der Reaktion wird vorgeschlagen.

Résumé

On a étudié la cinétique de la réaction arsénite sur cérium-IV, catalysée par l'iode. Elle ne présente les caractéristiques d'une réaction du premier ordre qu'en présence de chlorure. L'ion chlorure manifeste aussi une activité catalytique. On a trouvé qu'en présence de chlorure, la catalyse par l'iode était empêchée jusqu'à un certain point. On suggère un nouveau mécanisme pour la réaction.

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Authors and Affiliations

  1. Kliniek voor Roentgen- en Curietherapie, Ghent, Belgium

    J. Deman

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  1. J. Deman
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Deman, J. Iodine catalysis in the ceric-arsenite reaction. Role played by the chloride ion. Mikrochim Acta 52, 67–78 (1964). https://doi.org/10.1007/BF01215667

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  • DOI: https://doi.org/10.1007/BF01215667

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