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Rate constants for the reactions of chlorine atoms with hydrochloroethers at 298 k and atmospheric pressure
Author(s) -
Dalmasso Pablo R.,
Taccone Raúl A.,
Nieto Jorge D.,
Teruel Mariano A.,
Lane Silvia I.
Publication year - 2005
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.20091
Subject(s) - chemistry , reaction rate constant , chlorine atom , acetone , 1,2 dichloroethane , atmospheric pressure , molecule , chlorine , nitrogen , analytical chemistry (journal) , kinetics , medicinal chemistry , organic chemistry , catalysis , physics , oceanography , quantum mechanics , geology
The relative rate technique has been used to determine the rate constants for the reactions Cl + CH 3 OCHCl 2 → products and Cl + CH 3 OCH 2 CH 2 Cl → products. Experiments were carried out at 298 ± 2 K and atmospheric pressure using nitrogen as the bath gas. The decay rates of the organic species were measured relative to those of 1,2‐dichloroethane, acetone, and ethane. Using rate constants of (1.3 ± 0.2) × 10 −12 cm 3 molecule −1 s −1 , (2.4 ± 0.4) × 10 −12 cm 3 molecule −1 s −1 , and (5.9 ± 0.6) × 10 −11 cm 3 molecule −1 s −1 for the reactions of Cl atoms with 1,2‐dichloroethane, acetone, and ethane respectively, the following rate coefficients were derived for the reaction of Cl atoms (in units of cm 3 molecule −1 s −1 ) with CH 3 OCHCl 2 , k = (1.04 ± 0.30) × 10 −12 and CH 3 OCH 2 CH 2 Cl, k = (1.11 ± 0.20) × 10 −10 . Errors quoted represent two σ, and include the errors due to the uncertainties in the rate constants used to place our relative measurements on an absolute basis. The rate constants obtained are compared with previous literature data and used to estimate the atmospheric lifetimes for the studied ethers. © 2005 Wiley Periodicals, Inc. Int J Chem Kinet 37: 420–426, 2005