Atmospheric chemistry of pentachloroethane (CCl3CCl2H): Absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals, kinetics of the CCl3CCl2O2 + NO reaction, and fate of the CCl3CCl2O radical

Trine E. Møgelberg; Jens Sehested; Ole J. Nielsen; Timothy J. Wallington

doi:10.1021/j100046a019

Atmospheric chemistry of pentachloroethane (CCl₃CCl₂H): Absorption spectra of CCl₃CCl₂ and CCl₃CCl₂O₂ radicals, kinetics of the CCl₃CCl₂O₂ + NO reaction, and fate of the CCl₃CCl₂O radical

Trine E. Møgelberg, Jens Sehested, Ole J. Nielsen^*, Timothy J. Wallington

^*Corresponding author af dette arbejde

10 Citationer (Scopus)

Abstract

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.

Originalsprog	Engelsk
Tidsskrift	Journal of Physical Chemistry
Vol/bind	99
Udgave nummer	46
Sider (fra-til)	16932-16938
Antal sider	7
ISSN	0022-3654
DOI	https://doi.org/10.1021/j100046a019
Status	Udgivet - 1 jan. 1995

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10.1021/j100046a019

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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. et al.

I: Journal of Physical Chemistry, Bind 99, Nr. 46, 01.01.1995, s. 16932-16938.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

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title = "Atmospheric chemistry of pentachloroethane (CCl3CCl2H): Absorption spectra of CCl3CCl2 and CCl3CCl2O2 radicals, kinetics of the CCl3CCl2O2 + NO reaction, and fate of the CCl3CCl2O radical",

abstract = "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.",

author = "M{\o}gelberg, {Trine E.} and Jens Sehested and Nielsen, {Ole J.} and Wallington, {Timothy J.}",

year = "1995",

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journal = "Journal of Physical Chemistry",

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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.

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U2 - 10.1021/j100046a019

DO - 10.1021/j100046a019

M3 - Journal article

AN - SCOPUS:0042422452

SN - 0022-3654

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SP - 16932

EP - 16938

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 46

ER -