Gas-phase oxidation of CH2 = C(CH3)CH2Cl initiated by OH radicals and Cl atoms: Kinetics and fate of the alcoxy radical formed

Abstract

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/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.