High Temperature Reaction of S + SO2 → SO + SO: Implication of S2O2 Intermediate Complex Formation

Yoshinori Murakami*, Shouichi Onishi, Takaomi Kobayashi, Nobuyuki Fujii, Nobuyasu Isshiki, Kentaro Tsuchiya, Atsumu Tezaki, Hiroyuki Matsui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


The rate constant for the reaction S + SO2 → SO + SO (1) has been investigated by measuring time profiles of S atoms behind reflected shock waves using two experimental systems: S atoms were provided by the thermal decomposition of COS in the high-temperature range (2020-2800 K) and by excimer laser photolysis of COS in the low-temperature range (T = 1120-1540 K). The results of these experiments yield the rate constant with a non-Arrhenus temperature dependence, k1 = 10-39.73T8.21 exp(4828.5/T) cm3 molecules-1 s-1, over the extended temperature range (1120-2800 K). By comparing the rate constants with that derived from a conventional transition-state theory based on the potential energy surface calculated by the G2M-(CC1) methodology, a reaction mechanism including a contribution of the singlet state of the reaction intermediate S2O2 is discussed.

Original languageEnglish
Pages (from-to)10996-11000
Number of pages5
JournalJournal of Physical Chemistry A
Issue number50
StatePublished - 18 Dec 2003

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