One electron reduction of CCl₄ in oxygenated aqueous solutions

A CCl₃O₂ ^•-free radical mediated formation of Cl^- and CO₂

verfasst von

J. Mönig, D. Bahnemann, K. D. Asmus

Abstract

Product yields have been determined after one-electron-induced reduction of CCl₄ in aqueous solutions containing t-butanol and various concentrations of oxygen. It was shown that ĊCl₃ radicals add oxygen to form CCl₃O₂ ^• radicals, which eventually yield three chloride ions and CO₂. A constant ratio of G(Cl^-) G(CO₂) = 4 is found in solutions containing 1.5 × 10^-4 M or more oxygen. Competing reactions of the ĊCl₃ radical increase this ratio at lower oxygen concentrations. The rate constant for the oxygen addition to ĊCl₃ radicals was determined by pulse radiolysis to 3.3 × 10⁹ M^-1 s^-1. Possible reaction mechanisms leading to the observed end products are discussed.

Externe Organisation(en)

Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

Typ

Artikel

Journal

Chemico-biological interactions

Band

47

Seiten

15-27

Anzahl der Seiten

13

ISSN

0009-2797

Publikationsdatum

15.10.1983

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Toxikologie

Elektronische Version(en)

https://doi.org/10.1016/0009-2797(83)90144-8 (Zugang: Unbekannt)