Photochemical Properties of CH2═CH-CFCl-CF2Br (4-Bromo-3-chloro-3,4,4-trifluoro-1-butene) and CH3-O-CH(CF3)2 (Methyl Hexafluoroisopropyl Ether): OH Reaction Rate Constants and UV and IR Absorption Spectra
Abstract
Rate constants for the reactions of hydroxyl radicals (OH) with 1,1,1,3,3,3-hexafluoroisopropyl methyl ether (CH 3 -O-CH(CF 3 ) 2 ) and 4-bromo-3-chloro-3,4,4-trifluoro-1-butene (CH 2 ═CH-CFCl-CF 2 Br) have been measured over the temperature range 230–370 K to give the following Arrhenius expressions: k CH3OCH(CF3)2 ( T ) = 7.69 × 10 –14 × ( T /298) 2.99 × exp(+342/ T ), cm 3 molecule –1 s –1, and k CH2CHCFClCF2Br ( T ) = (6.45 ± 0.72) × 10 –13 × exp{+(424 ± 32)/ T }, cm 3 molecule –1 s –1 . Atmospheric lifetimes of compounds were estimated to be 67 days and 4.5 days, respectively. UV absorption spectrum of CH 2 ═CH-CFCl-CF 2 Br between 164 and 260 nm and IR absorption spectra of both compounds between 450 and 1600 cm –1 were measured at room temperature.
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Evidence for Substantial Variations of Atmospheric Hydroxyl Radicals in the Past Two Decades
Prinn, R. G., Huang, J., Weiss, R. F., Cunnold, D. M., Fraser, P. J., Simmonds, P. G., McCulloch, A., Harth, C., Salameh, P., O'Doherty, S., et al. (2001) · Science · doi:10.1126/science.1058673 · Cited by 695 · see citing works
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- Authors
- Orkin, V. L., Martynova, L. E., & Kurylo, M. J.
- Affiliations
- National Institute of Standards and Technology (US)
- Corresponding author
- Orkin, Vladimir L.
- ORCID
- Orkin, Vladimir L.
- Venue
- The Journal of Physical Chemistry A
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-07-19
- Volume
- 121
- Issue
- 30
- Pages
- 5675-5680
- ISSN
- 1089-5639 (ISSN-L)
- 1520-5215
- OpenAlex
- W2726289152
- Cited by
- 2
- References
- 1
- Citations by year
- 2022: 1 · 2018: 1
- FWCI
- 0.15
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Physical Chemistry A (publishedVersion)
- PubMed (publishedVersion)
- The Journal of Physical Chemistry A
- Funders
- National Aeronautics and Space Administration
- Mainstream Engineering Corporation
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric Ozone and Climate
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Fluorine in Organic Chemistry
- Keywords
- hydroxyl radical reactions, rate constants, Arrhenius parameters, atmospheric lifetime, UV absorption spectra, infrared spectra, photochemical properties, organofluorine compounds
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