Title: 298 K rate coefficients for the reaction of OH with i-C3H7I, n-C3H7I and C3H8
Authors: Carl, Shaun *
Crowley, JN * # ×
Issue Date: Nov-2001
Publisher: European geophysical soc
Series Title: Atmospheric Chemistry and Physics vol:1 pages:1-7
Abstract: The kinetics of the title reactions were investigated using the laser photolysis - resonance fluorescence method, employing the sequential two-photon dissociation of NO2 in the presence of H-2 as the OH source. The 298 K rate constant for OH + C3H8 was found to be (1.15 +/- 0.1) x 10(-12) cm(3) s(-1), in excellent agreement with the literature recommendation, and with a separate determination using HNO3 photolysis at 248 nm as the OH source. The 298 K rate constants for OH + n C3H7I and i-C3H7I were measured for the first time and found to be (1.47 +/- 0. 08) and (1.22 +/- 0.06) x 10(-12) cm(3) s(-1), respectively. The errors include an assessment of systematic error due to concentration measurement, which, for the propyl-iodides was minimised by on-line UV-absorption spectroscopy. These results show that reaction with OH is an important sink for n-C3H7I and i-C3H7I, which has implications for the reactive iodine budget of the marine boundary layer.
ISSN: 1680-7316
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Quantum Chemistry and Physical Chemistry Section
* (joint) first author
× corresponding author
# (joint) last author

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