Atmospheric chemistry of CH2BrCl, CHBrCl2, CHBr2Cl, CF3CHBrCl, and CBr2Cl2

M. Bilde; T. J. Wallington; C. Ferronato; J. J. Orlando; G. S. Tyndall; E. Estupiñan; S. Haberkorn

doi:10.1021/jp9733375

Atmospheric chemistry of CH₂BrCl, CHBrCl₂, CHBr₂Cl, CF₃CHBrCl, and CBr₂Cl₂

M. Bilde
, T. J. Wallington
, C. Ferronato
, J. J. Orlando
, G. S. Tyndall
, E. Estupiñan
, S. Haberkorn

Experimental Science Section

Research output: Contribution to journal › Article › peer-review

77 Scopus citations

Abstract

Relative-rate methods were used to measure the following rate constants at 296 K in 700 Torr of N₂, O₂, or air diluent (all cm³ molecule^-1 s^-1): k(OH + CHBrCl₂) = (1.2 ± 0.3) × 10^-13, k(OH + CH₂BrCl) = (1.2 ± 0.3) × 10^-13, k(Cl + CHBr₂Cl) = (2.2 ± 0.6) × 10^-13, k(Cl + CBr₂Cl₂) = (1.8 ± 0.4) × 10^-13, k(Cl + CBrCl₃) = (7.1 ± 0.9) × 10^-14, and k(Cl + CF₃CHBrCl) = (2.0 ± 0.3) × 10^-14. Over the temperature range 217-296 K, k(Cl + CHBrCl₂) = (2.6 ± 0.4) × 10^-12 exp(-852 ± 76/T) and k(Cl + CH₂BrCl) = (1.2 ± 0.2) × 10^-11 exp(-1000 ± 82/T) cm³ molecule^-1 s^-1 were found. The UV absorption spectra of CHBrCl₂, CF₃CHBrCl, and CHBr₂Cl were measured at temperatures between 223 and 298 K over the range 210-320 nm. The products of Cl-atom-initiated oxidation of CHBrCl₂, CBr₂Cl₂, CHBr₂Cl, and CF₃CHBrCl were determined using FTIR smog-chamber techniques. Reaction of Cl atoms with CHBrCl₂, CHBr₂Cl, and CF₃CHBrCl proceeds via hydrogen abstraction. Reaction of Cl atoms with CBr₂Cl₂ and CBrCl₃ occurs via bromine abstraction. Product studies of the Cl-initiated oxidation of CHBrCl₂ and CBr₂Cl₂ conducted with, and without, added NO showed strong evidence for the production of chemically activated alkoxy radicals in the reaction of CBrCl₂O₂ radicals with NO. These results are discussed with respect to the atmospheric chemistry of CH₂BrCl, CHBrCl₂, CHBr₂Cl, CBr₂Cl₂, CF₃CHBrCl, and other brominated organic compounds.

Original language	English
Pages (from-to)	1976-1986
Number of pages	11
Journal	Journal of Physical Chemistry A
Volume	102
Issue number	11
DOIs	https://doi.org/10.1021/jp9733375
State	Published - Mar 12 1998

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10.1021/jp9733375

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@article{9d1532f75abd4ea1bfe82d4349bfbd0e,

title = "Atmospheric chemistry of CH2BrCl, CHBrCl2, CHBr2Cl, CF3CHBrCl, and CBr2Cl2",

abstract = "Relative-rate methods were used to measure the following rate constants at 296 K in 700 Torr of N2, O2, or air diluent (all cm3 molecule-1 s-1): k(OH + CHBrCl2) = (1.2 ± 0.3) × 10-13, k(OH + CH2BrCl) = (1.2 ± 0.3) × 10-13, k(Cl + CHBr2Cl) = (2.2 ± 0.6) × 10-13, k(Cl + CBr2Cl2) = (1.8 ± 0.4) × 10-13, k(Cl + CBrCl3) = (7.1 ± 0.9) × 10-14, and k(Cl + CF3CHBrCl) = (2.0 ± 0.3) × 10-14. Over the temperature range 217-296 K, k(Cl + CHBrCl2) = (2.6 ± 0.4) × 10-12 exp(-852 ± 76/T) and k(Cl + CH2BrCl) = (1.2 ± 0.2) × 10-11 exp(-1000 ± 82/T) cm3 molecule-1 s-1 were found. The UV absorption spectra of CHBrCl2, CF3CHBrCl, and CHBr2Cl were measured at temperatures between 223 and 298 K over the range 210-320 nm. The products of Cl-atom-initiated oxidation of CHBrCl2, CBr2Cl2, CHBr2Cl, and CF3CHBrCl were determined using FTIR smog-chamber techniques. Reaction of Cl atoms with CHBrCl2, CHBr2Cl, and CF3CHBrCl proceeds via hydrogen abstraction. Reaction of Cl atoms with CBr2Cl2 and CBrCl3 occurs via bromine abstraction. Product studies of the Cl-initiated oxidation of CHBrCl2 and CBr2Cl2 conducted with, and without, added NO showed strong evidence for the production of chemically activated alkoxy radicals in the reaction of CBrCl2O2 radicals with NO. These results are discussed with respect to the atmospheric chemistry of CH2BrCl, CHBrCl2, CHBr2Cl, CBr2Cl2, CF3CHBrCl, and other brominated organic compounds.",

author = "M. Bilde and Wallington, \{T. J.\} and C. Ferronato and Orlando, \{J. J.\} and Tyndall, \{G. S.\} and E. Estupi{\~n}an and S. Haberkorn",

year = "1998",

month = mar,

day = "12",

doi = "10.1021/jp9733375",

language = "English",

volume = "102",

pages = "1976--1986",

journal = "Journal of Physical Chemistry A",

issn = "1089-5639",

publisher = "American Chemical Society",

number = "11",

}

TY - JOUR

T1 - Atmospheric chemistry of CH2BrCl, CHBrCl2, CHBr2Cl, CF3CHBrCl, and CBr2Cl2

AU - Bilde, M.

AU - Wallington, T. J.

AU - Ferronato, C.

AU - Orlando, J. J.

AU - Tyndall, G. S.

AU - Estupiñan, E.

AU - Haberkorn, S.

PY - 1998/3/12

Y1 - 1998/3/12

N2 - Relative-rate methods were used to measure the following rate constants at 296 K in 700 Torr of N2, O2, or air diluent (all cm3 molecule-1 s-1): k(OH + CHBrCl2) = (1.2 ± 0.3) × 10-13, k(OH + CH2BrCl) = (1.2 ± 0.3) × 10-13, k(Cl + CHBr2Cl) = (2.2 ± 0.6) × 10-13, k(Cl + CBr2Cl2) = (1.8 ± 0.4) × 10-13, k(Cl + CBrCl3) = (7.1 ± 0.9) × 10-14, and k(Cl + CF3CHBrCl) = (2.0 ± 0.3) × 10-14. Over the temperature range 217-296 K, k(Cl + CHBrCl2) = (2.6 ± 0.4) × 10-12 exp(-852 ± 76/T) and k(Cl + CH2BrCl) = (1.2 ± 0.2) × 10-11 exp(-1000 ± 82/T) cm3 molecule-1 s-1 were found. The UV absorption spectra of CHBrCl2, CF3CHBrCl, and CHBr2Cl were measured at temperatures between 223 and 298 K over the range 210-320 nm. The products of Cl-atom-initiated oxidation of CHBrCl2, CBr2Cl2, CHBr2Cl, and CF3CHBrCl were determined using FTIR smog-chamber techniques. Reaction of Cl atoms with CHBrCl2, CHBr2Cl, and CF3CHBrCl proceeds via hydrogen abstraction. Reaction of Cl atoms with CBr2Cl2 and CBrCl3 occurs via bromine abstraction. Product studies of the Cl-initiated oxidation of CHBrCl2 and CBr2Cl2 conducted with, and without, added NO showed strong evidence for the production of chemically activated alkoxy radicals in the reaction of CBrCl2O2 radicals with NO. These results are discussed with respect to the atmospheric chemistry of CH2BrCl, CHBrCl2, CHBr2Cl, CBr2Cl2, CF3CHBrCl, and other brominated organic compounds.

AB - Relative-rate methods were used to measure the following rate constants at 296 K in 700 Torr of N2, O2, or air diluent (all cm3 molecule-1 s-1): k(OH + CHBrCl2) = (1.2 ± 0.3) × 10-13, k(OH + CH2BrCl) = (1.2 ± 0.3) × 10-13, k(Cl + CHBr2Cl) = (2.2 ± 0.6) × 10-13, k(Cl + CBr2Cl2) = (1.8 ± 0.4) × 10-13, k(Cl + CBrCl3) = (7.1 ± 0.9) × 10-14, and k(Cl + CF3CHBrCl) = (2.0 ± 0.3) × 10-14. Over the temperature range 217-296 K, k(Cl + CHBrCl2) = (2.6 ± 0.4) × 10-12 exp(-852 ± 76/T) and k(Cl + CH2BrCl) = (1.2 ± 0.2) × 10-11 exp(-1000 ± 82/T) cm3 molecule-1 s-1 were found. The UV absorption spectra of CHBrCl2, CF3CHBrCl, and CHBr2Cl were measured at temperatures between 223 and 298 K over the range 210-320 nm. The products of Cl-atom-initiated oxidation of CHBrCl2, CBr2Cl2, CHBr2Cl, and CF3CHBrCl were determined using FTIR smog-chamber techniques. Reaction of Cl atoms with CHBrCl2, CHBr2Cl, and CF3CHBrCl proceeds via hydrogen abstraction. Reaction of Cl atoms with CBr2Cl2 and CBrCl3 occurs via bromine abstraction. Product studies of the Cl-initiated oxidation of CHBrCl2 and CBr2Cl2 conducted with, and without, added NO showed strong evidence for the production of chemically activated alkoxy radicals in the reaction of CBrCl2O2 radicals with NO. These results are discussed with respect to the atmospheric chemistry of CH2BrCl, CHBrCl2, CHBr2Cl, CBr2Cl2, CF3CHBrCl, and other brominated organic compounds.

UR - https://www.scopus.com/pages/publications/0000421677

U2 - 10.1021/jp9733375

DO - 10.1021/jp9733375

M3 - Article

AN - SCOPUS:0000421677

SN - 1089-5639

VL - 102

SP - 1976

EP - 1986

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 11

ER -

Atmospheric chemistry of CH₂BrCl, CHBrCl₂, CHBr₂Cl, CF₃CHBrCl, and CBr₂Cl₂

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