298 K rate coefficients for the reaction of OH with i-C3H7I, n-C3H7I and C3H8Report as inadecuate




298 K rate coefficients for the reaction of OH with i-C3H7I, n-C3H7I and C3H8 - Download this document for free, or read online. Document in PDF available to download.

1 Atmospheric Chemistry Department 2 Department of Chemistry Leuven

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 H2 as the OH source. The 298 K rate constant for OH + C3H8 was found to be 1.15±0.1 × 10-12 cm3 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 × 10-12 cm3 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. The implications of these results for the reactive iodine budget of the marine boundary layer are discussed.





Author: S. A. Carl - J. N. Crowley -

Source: https://hal.archives-ouvertes.fr/



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