Cinética en fase gaseosa de las reacciones oxidativas de metil dicloroacetato iniciada por radicales OH y átomos de Cl en condiciones atmosféricas

VIANNI STRACCIA, CYNTHIA RIVELA, MARIA BLANCO, PETER WIESEN Y MARIANO TERUEL

Asuncion

Simposio; V Simposio de Química Inorgánica, Analítica y Fisicoquímica (V QIAF), FCQ-UNA, Paraguay; 2021

This investigation reports the first kinetic study for the reactions of OH radicals and Cl atoms with methyl dichloroacetate CHCl2C(O)OCH3) at room temperature and atmospheric pressure using the relative technique. The experiments were performed in a Pyrex glass atmospheric simulation chamber by ?in situ? FTIR spectroscopy. The following rate constants values were determined from the average of a series of measurements: kOH=(3.55±0.47)×10-15 and kCl=(3.31±0.50)×10-13 cm3.molecule-1s-1. In addition, the environmental implications of these reactions were evaluated by the tropospheric lifetimes (τOH=4.5 years and τCl=10 years.); Photochemical Ozone Creation Potential (POCP=0.03); Acidification Potential (AP=0.45) and the Global Warming Potential calculated relative to CO2 on a time horizon of 20, 100 and 500 years (GWP20=103; GWP100=28; GWP500=8). Keywords: kinetics, chloroester, radicals.