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Kinetics of the reactions of the IO radical with dimethyl sulfide, methanethiol, ethylene, and propylene

✍ Scribed by F. Maguin; A. Mellouki; G. Laverdet; G. Poulet; G. Le Bras

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 504 KB
Volume: 23
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550230306

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✦ Synopsis

Abstract

The reactions of IO radicals with CH~3~SCH~3~, CH~3~SH, C~2~H~4~, and C~3~H~6~ have been studied using the discharge flow method with direct detection of IO radicals by mass spectrometry. The absolute rate constants obtained at 298 K are the following: IO + CH~3~SCH~3~ → products (1): k~1~ = (1.5 ± 0.2) × 10^−14^; IO + CH~3~SH → products (2): k~2~ = (6.6 ± 1.3) × 10^−16^; IO + C~2~H~4~ →products (3): k~3~ < 2 × 10^−16^; IO + C~3~H~6~ → products (4): k~4~ < 2 × 10^−16^ (units are cm^3^ molecule^−1^ s^−1^). CH~3~S(O)CH~3~ and HOI were found as products of reactions (1) and (2), respectively. The present lower value of k~1~ compared to our previous determination is discussed.

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