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Rate constants for the reactions of C 2 H 5 O, i‐C 3 H 7 O, and n‐C 3 H 7 O with NO and O 2 as a function of temperature
Author(s) -
Fittschen C.,
Frenzel A.,
Imrik K.,
Devolder P.
Publication year - 1999
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(1999)31:12<860::aid-kin4>3.0.co;2-e
Subject(s) - chemistry , torr , arrhenius equation , radical , reaction rate constant , analytical chemistry (journal) , kinetics , thermodynamics , organic chemistry , activation energy , physics , quantum mechanics
The rate constants of the reactions of ethoxy (C 2 H 5 O), i‐propoxy (i‐C 3 H 7 O) and n‐propoxy (n‐C 3 H 7 O) radicals with O 2 and NO have been measured as a function of temperature. Radicals have been generated by laser photolysis from the appropriate alkyl nitrite and have been detected by laser‐induced fluorescence. The following Arrhenius expressions have been determined: (R 1 ) C 2 H 5 O + O 2 → products k 1 = (2.4 ± 0.9) × 10 −14 exp(−2.7 ± 1.0 kJmol −1 /RT) cm 3 s −1 295K < T < 354K p = 100 Torr(R 2 ) i‐C 3 H 7 O + O 2 → products k 2 = (1.6 ± 0.2) × 10 −14 exp(−2.2 ± 0.2 kJmol −1 /RT) cm 3 s −1 288K < T < 364K p = 50–200 Torr(R 3 ) n‐C 3 H 7 O + O 2 → products k 3 = (2.5 ± 0.5) × 10 −14 exp(−2.0 ± 0.5 kJmol −1 /RT) cm 3 s −1 289K < T < 381K p = 30–100 Torr(R 4 ) C 2 H 5 O + NO → products k 4 = (2.0 ± 0.7) × 10 −11 exp(0.6 ± 0.4 kJmol −1 /RT) cm 3 s −1 286K < T < 388K p = 30–500 Torr(R 5 ) i‐C 3 H 7 O + NO → products k 5 = (8.9 ± 0.2) × 10 −12 exp(3.3 ± 0.5 kJmol −1 /RT) cm 3 s −1 286K < T < 389K p = 30–500 Torr(R 6 ) n‐C 3 H 7 O + NO → products k 6 = (1.2 ± 0.2) × 10 −11 exp(2.9 ± 0.4 kJmol −1 /RT) cm 3 s −1 289K < T < 380K p = 30–100 Torr All reactions have been found independent of total pressure between 30 and 500 Torr within the experimental error. © 1999 John Wiley & Sons, Inc. Int J Chem Kinet 31: 860–866, 1999