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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 2
BKCSDE 23(2)
February 20, 2002 

The Reactions of O(3P) Atom with Halomethanes:Discharge Flow-Chemiluminescence Imaging Method
Jee-Yon Lee, Hee-Soo Yoo
CF3I, CH3I, CHBrCl2, O(3P), Chemiluminescence imaging method.
The reactions of triplet oxygen atom with halomethanes as a potential fire extinguisher were studied by a discharge flow-chemiluminescence imaging method. The experiments were carried out under second order conditions. The bimolecular atom-molecule reaction rate constants were determined in terms of the initial rate method. The initial concentration of oxygen atom was also determined under second order rate law instead of the pseudo-first order conditions with [O(3P)]0<<[sample]0. The second order conditions were more reliable than pseudo-first order conditions for the determinations of rate constants. The rate constants of the reactions CF3I + O(3P), CH3PI + O(3P), and CHBrCl2 + O(3P) were determined to be 5.0 ×10-12 , 1.1 ×10-11 , and 1.9 ×10-14 cm3 molecule-1 s-1, respectively.
291 - 294
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