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A kinetic study of the gas-phase reactions of OIO with NO, NO2, and Cl2

✍ Scribed by Shinichi Enami; Yosuke Hoshino; Masahiro Kawasaki

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 243 KB
Volume: 39
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.20283

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✦ Synopsis

Abstract

The kinetics of iodine dioxide (OIO) reactions with nitric oxide (NO), nitrogen dioxide (NO~2~), and molecular chlorine (Cl~2~) are studied in the gas‐phase by cavity ring‐down spectroscopy. The absorption spectrum of OIO is monitored after the laser photodissociation, 266 or 355 nm, of the gaseous mixture, CH~2~I~2~/O~2~/N~2~, which generates OIO through a series of reactions. The second‐order rate constant of the reaction OIO + NO is determined to be (4.8 ± 0.9) × 10^−12^ cm^3^ molecule^−1^ s^−1^ under 30 Torr of N~2~ diluent at 298 K. We have also measured upper limits for the second‐order rate constants of OIO with NO~2~ and Cl~2~ to be k < 6 × 10^−14^ cm^3^ molecule^−1^ s^−1^ and k < 8 × 10^−13^ cm^3^ molecule^−1^ s^−1^, respectively. © 2007 Wiley Periodicals, Inc. Int J Chem Kinet 39: 688–693, 2007

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