title: An experimental study of the gas-phase reactions of NO3 radicals with a series of unsaturated aldehydes: trans-2-hexenal, trans-2-heptenal, and trans-2-octenal.
abstract: Rate constants for the gas-phase reactions of the NO(3) radical with a series of unsaturated aldehydes, trans-2-hexenal, trans-2-heptenal, and trans-2-octenal, have been measured using absolute rate method at 294 ± 3 K and atmospheric pressure. This work was performed to clarify discrepancies found in the literature and thus led to a clearer view of the effect of the increasing carbon chain length on the reactivity of trans-2-alkenals. The rate constants were determined to be (4.7 ± 1.5) × 10(-15), (5.3 ± 1.6) × 10(-15), and (5.6 ± 2.3) × 10(-15) cm(3) molecule(-1) s(-1) for trans-2-hexenal, trans-2-heptenal, and trans-2-octenal, respectively. These results clearly indicate that the carbon chain lengthening of the trans-2-alkenals does not significantly affect the rate constant. In addition, the mechanism for the reaction of NO(3) with these unsaturated aldehydes was also investigated. Unsaturated peroxynitrate-type compounds that are exclusively formed through the abstraction channel were observed as the main products.
authors.affiliation: Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris Est Créteil (UPEC) et Université Paris Diderot (UPD), Institut Pierre Simon Laplace, 61 Avenue du Général de Gaulle, 94010 cedex Créteil, France.
authors.forename: Jamila
authors.initials: J
authors.lastname: Kerdouci
authors.forename: Bénédicte
authors.initials: B
authors.lastname: Picquet-Varrault
authors.forename: Régine
authors.initials: R
authors.lastname: Durand-Jolibois
authors.forename: Cécile
authors.initials: C
authors.lastname: Gaimoz
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Doussin
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D005740:Gases / Q000737:chemistry; D007700:Kinetics; D015394:Molecular Structure; D009566:Nitrates / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D005609:Free Radicals; D005740:Gases; D009566:Nitrates; C064600:2-heptenal; C051750:2-hexenal