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Flowtube reactor study of the association reactions of CHCl 2 and CCl 3 with O 2 at low pressure
Author(s) -
Nottingham Winston C.,
Rudolph R. Neil,
Andrews Kevin P.,
Moore John H.,
Tossell John A.
Publication year - 1994
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.550260709
Subject(s) - chemistry , radical , photoionization , helium , analytical chemistry (journal) , atmospheric temperature range , thermodynamics , ion , organic chemistry , ionization , physics
The new flowtube reactor employing dissociative electron attachment to produce radicals and high‐pressure photoionization in the mass spectrometric detection of radicals is described. The system has been applied to a study of the association reactions of CHCl 2 and CCl 3 with O 2 in a great excess of helium at total densities below 10 17 cm −3 over the temperature range 286 to 332 K. Both reactions display a strong negative temperature coefficient. The results can be parameterized in the form k 0 (CHCl 2 + O 2 ) = (4.3 ± 0.2) × 10 −31 ( T /300) −6.7±0.7 cm 6 s −1 , k 0 (CCl 3 + O 2 ) = (2.7 ± 0.2) × 10 −31 ( T /300) −8.7±1.0 cm 6 s −1 . © 1994 John Wiley & Sons, Inc.