Reaction rate coefficients of OH radicals and Cl atoms with ethyl propanoate, n-propyl propanoate, methyl 2-methylpropanoate, and ethyl n-butanoate.
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.
Cometto
Pablo M
PM
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.
Daële
Véronique
V
Idir
Mahmoud
M
Lane
Silvia I
SI
Mellouki
Abdelwahid
A
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*
D000393:Air Pollutants; D002087:Butyrates; D004952:Esters; D011422:Propionates; C547767:methyl 2-methylpropanoate; D017665:Hydroxyl Radical; D002713:Chlorine; C069373:ethyl propionate; C045572:ethyl butyrate