Degradaciòn troposférica del 3-cloro-2-metil-1-propeno:coeficientes de velocidad con radicales OH y átomos de Cl a 298K

CYNTHIA RIVELA, RODRIGO G. GIBILISCO Y MARIANO A. TERUEL

Valparaiso

Jornada; XXII Jornadas de Jóvenes Investigadores de AUGM; 2014

Asociacion de Universidades del Grupo Montevideo

Relative kinetics of the reactions of OH radicals and Cl atoms with 3-chloro-2-methyl-1-propene has been studied for the first time at 298 K and 1 atm by GC-FID. Rate coefficients are found to be (in cm3 molecule-1 s-1): k1 (OH + CH2=C(CH3)CH2Cl) = (3.23 ± 0.35)  10-11 , k2 (Cl + CH2=C(CH3)CH2Cl) = (2.10±0.78)10-10 with uncertainties representing ± 2σ. Product identification under atmospheric conditions was performed by solid phase microextraction (SPME) / GC-MS for OH reaction. Chloropropanone was identified as the main degradation product in accordance with the decomposition of the 1,2- hydroxy alcoxy radical formed. Additionally, reactivity trends and atmospheric implications are discussed.