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Rate constants for the reaction of OH radicals with n-propyl, n-butyl, iso-butyl and tert-butyl vinyl ethers
AbstractRate constants for the reaction of OH radicals with n-propyl vinyl ether (PVE, CH3CH2CH2OCHCH2), n-butyl vinyl ether (BVE, CH3CH2CH2CH2OCHCH2), iso-butyl vinyl ether (IBVE, (CH3)2CHCH2OCHCH2) and tert-butyl vinyl ether (TBVE, (CH3)3COCHCH2), have been measured in the temperature and pressure ranges 232–373K and 30–300Torr using the pulsed laser photolysis-laser-induced fluorescence method, and at 298K and 760Torr using the relative method. The obtained results are k1=(9.3±0.6)×10−12 exp[(708±20)/T], k2=(1.5±0.2)×10−11 exp[(572±42)/T], k3=(1.6±0.1)×10−11 exp[(567±20)/T], k4=(1.7±0.2)×10−11 exp[(549±25)/T]cm3molecule−1s−1. The values at 298K are k1=(1.0±0.1)×10−10, k2=(1.0±0.1)×10−10, k3=(1.1±0.1)×10−10, k4=(1.1±0.1)×10−10cm3molecule−1s−1. The deduced tropospheric lifetimes of these ethers for reaction with OH are of the order of 1h and they are comparable to those for reaction with ozone.
Rate constants for the reaction of OH radicals with n-propyl, n-butyl, iso-butyl and tert-butyl vinyl ethers
AbstractRate constants for the reaction of OH radicals with n-propyl vinyl ether (PVE, CH3CH2CH2OCHCH2), n-butyl vinyl ether (BVE, CH3CH2CH2CH2OCHCH2), iso-butyl vinyl ether (IBVE, (CH3)2CHCH2OCHCH2) and tert-butyl vinyl ether (TBVE, (CH3)3COCHCH2), have been measured in the temperature and pressure ranges 232–373K and 30–300Torr using the pulsed laser photolysis-laser-induced fluorescence method, and at 298K and 760Torr using the relative method. The obtained results are k1=(9.3±0.6)×10−12 exp[(708±20)/T], k2=(1.5±0.2)×10−11 exp[(572±42)/T], k3=(1.6±0.1)×10−11 exp[(567±20)/T], k4=(1.7±0.2)×10−11 exp[(549±25)/T]cm3molecule−1s−1. The values at 298K are k1=(1.0±0.1)×10−10, k2=(1.0±0.1)×10−10, k3=(1.1±0.1)×10−10, k4=(1.1±0.1)×10−10cm3molecule−1s−1. The deduced tropospheric lifetimes of these ethers for reaction with OH are of the order of 1h and they are comparable to those for reaction with ozone.
Rate constants for the reaction of OH radicals with n-propyl, n-butyl, iso-butyl and tert-butyl vinyl ethers
Thiault, G. (author) / Mellouki, A. (author)
Atmospheric Environment ; 40 ; 5566-5573
2006-05-09
8 pages
Article (Journal)
Electronic Resource
English
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