Pulse radiolysis study of CF3CCI2 and CF3CCI2O2 radicals in the gas phase at 295K

T. J. Wallington; T. Ellermann; OLE J. Nielsen

doi:10.1163/156856794X00333

Pulse radiolysis study of CF₃CCI₂ and CF₃CCI₂O₂ radicals in the gas phase at 295K

T. J. Wallington^*, T. Ellermann, OLE J. Nielsen

^*Corresponding author af dette arbejde

9 Citationer (Scopus)

Abstract

The ultraviolet absorption spectra and self reaction kinetics of CF₃CCI₂ and CF₃CCI₂O₂ radicals have been studied in the gas phase at 295K. Absorption cross sections were quantified over the wavelength range 220-300 nm. Measured cross sections near the absorption maxima were γ_CF3CCI2(230 nm) = (9.70 ± 1.47) x 10^-18 and γ_CF3CCI2O2(250 nm) = (1.70 ± 0.26) x 10^-18 cm² molecule^-1. Errors are statistical (2γ) together with our estimate of potential systematic errors. Rate constants for the self reaction of CF₃CCI₂ and CF₃CCI₂O₂ radicals were measured to be k₆ = (2.46 ± 0.43) x 10^-12 and k_7obs = (3.33 ± 0.53) x 10^-12 cm³ molecule^-1 s^-1, respectively. Results are discussed with respect to the existing database concerning halogenated peroxy radicals.

Originalsprog	Engelsk
Tidsskrift	Research on Chemical Intermediates
Vol/bind	20
Udgave nummer	3-5
Sider (fra-til)	265-276
Antal sider	12
ISSN	0922-6168
DOI	https://doi.org/10.1163/156856794X00333
Status	Udgivet - 1 jan. 1994

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@article{215d629ae7e44b6898f260a2ba85ffac,

title = "Pulse radiolysis study of CF3CCI2 and CF3CCI2O2 radicals in the gas phase at 295K",

abstract = "The ultraviolet absorption spectra and self reaction kinetics of CF3CCI2 and CF3CCI2O2 radicals have been studied in the gas phase at 295K. Absorption cross sections were quantified over the wavelength range 220-300 nm. Measured cross sections near the absorption maxima were γCF3CCI2(230 nm) = (9.70 ± 1.47) x 10-18 and γCF3CCI2O2(250 nm) = (1.70 ± 0.26) x 10-18 cm2 molecule-1. Errors are statistical (2γ) together with our estimate of potential systematic errors. Rate constants for the self reaction of CF3CCI2 and CF3CCI2O2 radicals were measured to be k6 = (2.46 ± 0.43) x 10-12 and k7obs = (3.33 ± 0.53) x 10-12 cm3 molecule-1 s-1, respectively. Results are discussed with respect to the existing database concerning halogenated peroxy radicals.",

author = "Wallington, {T. J.} and T. Ellermann and Nielsen, {OLE J.}",

year = "1994",

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doi = "10.1163/156856794X00333",

language = "English",

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TY - JOUR

T1 - Pulse radiolysis study of CF3CCI2 and CF3CCI2O2 radicals in the gas phase at 295K

AU - Wallington, T. J.

AU - Ellermann, T.

AU - Nielsen, OLE J.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - The ultraviolet absorption spectra and self reaction kinetics of CF3CCI2 and CF3CCI2O2 radicals have been studied in the gas phase at 295K. Absorption cross sections were quantified over the wavelength range 220-300 nm. Measured cross sections near the absorption maxima were γCF3CCI2(230 nm) = (9.70 ± 1.47) x 10-18 and γCF3CCI2O2(250 nm) = (1.70 ± 0.26) x 10-18 cm2 molecule-1. Errors are statistical (2γ) together with our estimate of potential systematic errors. Rate constants for the self reaction of CF3CCI2 and CF3CCI2O2 radicals were measured to be k6 = (2.46 ± 0.43) x 10-12 and k7obs = (3.33 ± 0.53) x 10-12 cm3 molecule-1 s-1, respectively. Results are discussed with respect to the existing database concerning halogenated peroxy radicals.

AB - The ultraviolet absorption spectra and self reaction kinetics of CF3CCI2 and CF3CCI2O2 radicals have been studied in the gas phase at 295K. Absorption cross sections were quantified over the wavelength range 220-300 nm. Measured cross sections near the absorption maxima were γCF3CCI2(230 nm) = (9.70 ± 1.47) x 10-18 and γCF3CCI2O2(250 nm) = (1.70 ± 0.26) x 10-18 cm2 molecule-1. Errors are statistical (2γ) together with our estimate of potential systematic errors. Rate constants for the self reaction of CF3CCI2 and CF3CCI2O2 radicals were measured to be k6 = (2.46 ± 0.43) x 10-12 and k7obs = (3.33 ± 0.53) x 10-12 cm3 molecule-1 s-1, respectively. Results are discussed with respect to the existing database concerning halogenated peroxy radicals.

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U2 - 10.1163/156856794X00333

DO - 10.1163/156856794X00333

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SN - 0922-6168

VL - 20

SP - 265

EP - 276

JO - Research on Chemical Intermediates

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