Kinetic study of the reactions of Cl atoms with a,b-unsaturated carbonyl 3 compounds at atmospheric pressure and structure activity relations (SARs)

M.A. TERUEL, M: ACHAD, M. B. BLANCO

CHEMICAL PHYSICS LETTERS

Año: 2009 vol. 479 p. 25 - 29

0009-2614

The kinetics of the reactions of Cl atoms with three unsaturated carbonyl compounds at 298 K and atmo- 17spheric pressure were investigated for the first time using the GC–FID technique. Rate coefficients (in 18cm3 molecule1 s1) of k1(Cl + CH2@CHC(O)CH2CH3) = (2.91 ± 1.10)  1010, k2(Cl + CH2@CHOC(O)CH2- 19CH3) = (2.06 ± 0.36)  1010 and k3(Cl + CH2@CHC(O)OCH2CH3) = (2.53 ± 0.46)  1010 were obtained 20using the relative rate method with different references. Structure activity relationships (SARs) were 21developed for the reactions of Cl with a wide range of unsaturated compounds. On the basis of our kinetic 22measurements, tropospheric lifetimes of the studied unsaturated compounds are estimated.