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Rate constants for the reactions of Cl atoms with HCOOH and with HOCO radicals

✍ Scribed by Qiang Li; Michael C. Osborne; Ian W. M. Smith

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 91 KB
Volume: 32
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(2000)32:2<85::aid-kin3>3.0.co;2-i

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✦ Synopsis

Rate constants have been measured at room temperature for the reactions of Cl atoms with formic acid and with the HOCO radical: Cl ϩ HCOOH !: HCl ϩ HOCO (R1) Cl ϩ HOCO !: HCl ϩ CO (R2) 2

Cl atoms were generated by flash photolysis of Cl 2 and the progress of reaction was followed by time-resolved infrared absorption measurements using tunable diode lasers on the CO 2 that was formed either in the pair of reactions (R1) plus (R2), or in reaction (R1) followed by

In a separate series of experiments, conditions were chosen so that the kinetics of CO 2 formation were dominated either by the rate of reaction (R1) or by that of reactions (R1) and (R2) combined. The results of our analysis of these experiments yielded: Ϫ13 3 Ϫ1 Ϫ1 k ϭ (1.8 Ϯ 0.12) ϫ 10 cm molecule s 1 3 Ϫ11 3 Ϫ1 Ϫ1 k ϭ (4.8 Ϯ 1.0) ϫ 10 cm molecule s 2

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