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Reevaluation of the rate constant for the reaction propene + NO3 by absolute rate determination

✍ Scribed by B. Picquet-Varrault; M. Scarfogliero; W. Ait Helal; J-F. Doussin

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 160 KB
Volume: 41
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.20371

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✦ Synopsis

Abstract

A rate constant for the reaction of NO~3~ with propene has been determined by an absolute rate technique at room temperature and atmospheric pressure. Experiments were performed in a Pyrex photoreactor coupled to two multiple reflection optical systems interfaced to a FTIR spectrometer and a UV–visible grating spectrometer. These two spectrometric devices allowed us a time‐resolved monitoring of propene and NO~3~ radicals. We propose the following rate constant: k = (6.4 ± l.l) × l0^−15^ cm^3^ molecule^−1^ s^−1^. This value is in good agreement with three published values but is about 30% lower than three other determinations and than the value recommended by frequently used bibliographic evaluations. As propene has been widely used as a reference compound in many other kinetic studies, implications of this reevaluation are briefly discussed. © 2008 Wiley Periodicals, Inc. Int J Chem Kinet 41: 73–81, 2009

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