Atmospheric chemistry of pentachloroethane (CCl3CCl2H): Absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals, kinetics of the CCl3CCl2O2 + NO reaction, and fate of the CCl3CCl2O radical
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Atmospheric chemistry of pentachloroethane (CCl3CCl2H) : Absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals, kinetics of the CCl3CCl2O2 + NO reaction, and fate of the CCl3CCl2O radical. / Møgelberg, Trine E.; Sehested, Jens; Nielsen, Ole J.; Wallington, Timothy J.
I: Journal of Physical Chemistry, Bind 99, Nr. 46, 01.01.1995, s. 16932-16938.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Atmospheric chemistry of pentachloroethane (CCl3CCl2H)
T2 - Absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals, kinetics of the CCl3CCl2O2 + NO reaction, and fate of the CCl3CCl2O radical
AU - Møgelberg, Trine E.
AU - Sehested, Jens
AU - Nielsen, Ole J.
AU - Wallington, Timothy J.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - The absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals and the rate constant for the reaction of CCl3CCl2O2 radicals with NO were measured at 296 ± 2 K using a pulse radiolysis technique. The absorption spectra were measured over the wavelength range 220-400 nm. At 230 nm σ(CCl3CCl2) = (271 ± 84) × 10-20 cm2 molecule-1, and at 240 nm σ(CCl3CCl2O2) = (145 ± 21) × 10-20 cm2 molecule-1. The reaction of F atoms with CCl3CCl2H was determined to have a rate constant of (2.3 ± 1.6) × 10-12 cm3 molecule-1 s-1. The reaction of CCl3CCl2O2 with NO proceeds with a rate constant of (6.2 ± 1.6) × 10-12 cm3 molecule-1 s-1. This reaction gives NO2 and CCl3CCl2O radicals. In the atmosphere, 85% of the CCl3CCl2O radicals eliminate a Cl atom to give CCl3C(O)Cl, and the remaining 15% decompose via C-C bond scission to give CCl3 radicals and COCl2. As part of the present work, relative rate techniques were used to measure rate constants at 296 ± 2 K for the reactions of Cl and F atoms with CCl3CCl2H of (5.2 ± 0.7) × 10-14 and (2.0 ± 0.5) × 10-12 cm3 molecule-1 s-1, respectively.
AB - The absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals and the rate constant for the reaction of CCl3CCl2O2 radicals with NO were measured at 296 ± 2 K using a pulse radiolysis technique. The absorption spectra were measured over the wavelength range 220-400 nm. At 230 nm σ(CCl3CCl2) = (271 ± 84) × 10-20 cm2 molecule-1, and at 240 nm σ(CCl3CCl2O2) = (145 ± 21) × 10-20 cm2 molecule-1. The reaction of F atoms with CCl3CCl2H was determined to have a rate constant of (2.3 ± 1.6) × 10-12 cm3 molecule-1 s-1. The reaction of CCl3CCl2O2 with NO proceeds with a rate constant of (6.2 ± 1.6) × 10-12 cm3 molecule-1 s-1. This reaction gives NO2 and CCl3CCl2O radicals. In the atmosphere, 85% of the CCl3CCl2O radicals eliminate a Cl atom to give CCl3C(O)Cl, and the remaining 15% decompose via C-C bond scission to give CCl3 radicals and COCl2. As part of the present work, relative rate techniques were used to measure rate constants at 296 ± 2 K for the reactions of Cl and F atoms with CCl3CCl2H of (5.2 ± 0.7) × 10-14 and (2.0 ± 0.5) × 10-12 cm3 molecule-1 s-1, respectively.
UR - http://www.scopus.com/inward/record.url?scp=0042422452&partnerID=8YFLogxK
U2 - 10.1021/j100046a019
DO - 10.1021/j100046a019
M3 - Journal article
AN - SCOPUS:0042422452
VL - 99
SP - 16932
EP - 16938
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 46
ER -
ID: 228191443