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Kinetics of the reactions of the IO radical with dimethyl sulfide, methanethiol, ethylene, and propylene
Author(s) -
Maguin F.,
Mellouki A.,
Laverdet G.,
Poulet G.,
Bras G. Le
Publication year - 1991
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550230306
Subject(s) - chemistry , methanethiol , radical , dimethyl sulfide , mass spectrometry , ethylene , kinetics , reaction rate constant , medicinal chemistry , analytical chemistry (journal) , sulfur , organic chemistry , catalysis , chromatography , physics , quantum mechanics
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.