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Kinetics of the reaction CH + N 2 rarr; [M] ⇒ [M] products in the range 10–620 torr and 298–1059 K
Author(s) -
Becker K. H.,
Geiger H.,
Wiesen P.
Publication year - 1996
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/(sici)1097-4601(1996)28:2<115::aid-kin7>3.0.co;2-y
Subject(s) - chemistry , arrhenius equation , torr , reaction rate constant , atmospheric temperature range , radical , analytical chemistry (journal) , arrhenius plot , kinetics , photodissociation , excimer , total pressure , activation energy , laser , thermodynamics , photochemistry , organic chemistry , physics , quantum mechanics , optics
The gas‐phase reaction of CH(X 2 Π) radicals with molecular nitrogen was studied in the temperature range 298–1059 K at total pressures between 10 and 620 torr. CH radicals were generated by excimer laser photolysis of CHCIBr 2 at 248 nm and were detected by laser‐induced fluorescence. The investigated reaction shows a strong temperature and pressure dependence. At pressures of 20, 100, and 620 torr the Arrhenius plots exhibit a strong decrease of the rate constant with increasing temperature. The rate constant is well described by,with E 0 in kJ/mol. The pressure dependence was studied at temperatures of 298, 410, 561, and 750 K. The rate constants for each temperature were fitted by the Troe formalism. From the calculated values of k 0 and k infinity , the Arrhenius expressions,were obtained with E 0 ( k 0 ) and E A ( k infinity ) in units of kJ/mol. Within the range of 298–750 K the temperature dependence of the broadening factor is well described by F c = 0.029 + (173.3/ T ). © 1996 John Wiley & Sons, Inc.