title: Reaction rate coefficients of OH radicals and Cl atoms with ethyl propanoate, n-propyl propanoate, methyl 2-methylpropanoate, and ethyl n-butanoate.
abstract: Kinetics of the reactions of OH radicals and Cl atoms with four saturated esters have been investigated. Rate coefficients for the gas-phase reactions of OH radicals with ethyl propanoate (k(1)), n-propyl propanoate (k(2)), methyl 2-methylpropanoate (k(3)), and ethyl n-butanoate (k(4)) were measured using a conventional relative rate method and the pulsed laser photolysis-laser induced fluorescence technique. At (296 +/- 2) K, the rate coefficients obtained by the two methods were in good agreement. Significant curvatures in the Arrhenius plots have been observed in the temperature range 243-372 K for k(1), k(3), and k(4). The rate coefficients for the reactions of the four esters with Cl atoms were determined using the relative rate method at (296 +/- 2) K and atmospheric pressure. The values obtained are presented, compared with the literature values when they exist, and discussed. Reactivity trends and atmospheric implications for these esters are also presented.
authors.affiliation: Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Centro Láser de Ciencias Moleculares, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Argentina.
authors.forename: Pablo M
authors.initials: PM
authors.lastname: Cometto
authors.forename: Véronique
authors.initials: V
authors.lastname: Daële
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Idir
authors.forename: Silvia I
authors.initials: SI
authors.lastname: Lane
authors.forename: Abdelwahid
authors.initials: A
authors.lastname: Mellouki
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002087:Butyrates / Q000737:chemistry*; D002713:Chlorine / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D011422:Propionates / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D002087:Butyrates; D004952:Esters; D011422:Propionates; C547767:methyl 2-methylpropanoate; D017665:Hydroxyl Radical; D002713:Chlorine; C069373:ethyl propionate; C045572:ethyl butyrate