Search

Fourier transform infrared smog chamber techniques were used to study the kinetics and mechanisms of the reactions of Cl atoms and OH radicals with pentafluorophenol (C6F5OH) in 700 Torr total pres...

Smog chamber techniques were used to determine k(CH3OCF2CHCl2 + Cl) = (5.04 ± 0.75) × 10−13, k(CH3OCF2CHCl2 + OH) = (2.18 ± 0.38) × 10−13, and k(CH3OCF2CHCl2 + O3)

Smog chamber/Fourier transform infrared (FTIR) techniques were used to measure the kinetics of the reaction of n-CH2═CH(CH2)xCN (x = 0–4) with Cl atoms, OH radicals, and O3: k(CH2═CHCN + Cl) = (1.03 ± 0.13) × 10–10, k(CH2═CHCH2CN + Cl) = (2.02 ± 0.35) × 10–10, k(CH2═CH(CH2)2CN + Cl) = (2.75 ± 0.45) × 10–10, k(CH2═CHCN + OH) = (4.21 ± 0.95) × 10–12, k(CH2═CHCH2CN + OH) = (1.55 ± 0.34) × 10–11, k(CH2═CH(CH2)2CN + OH) = (2.98 ± 0.64) × 10–11, k(CH2═CH(CH2)3CN + OH) = (3.34 ± 0.64) × 10–11, k(CH2═CH(CH2)4CN + OH) = (3.61 ± 0.85) × 10–11, k(CH2═CHCN + O3) = (2.55 ± 0.28) × 10–20, k(CH2═CHCH2CN + O3) = (1.17 ± 0.24) × 10–18, k(CH2═CH(CH2)2CN + O3) = (3.35 ± 0.69) × 10–18, k(CH2═CH(CH2)3CN + O3) = (4.07 ± 0.82) × 10–18, and k(CH2═CH(CH2)4CN + O3) = (7.13 ± 1.49) × 10–18 cm3 molecule–1 s–1 at a total pressure of 700 Torr of air or N2 diluents at 296 ± 2 K. CH2ClC(O)CN, HC(O)CN, HC(O)Cl, HCN, NCC(O)OONO2, and ClC(O)OONO2 were identified as products from the Cl initiated oxidation of CH2═CHCN. The product spectra w...

Long pathlength/FTIR smog chamber techniques were used to determine the Cl atom initiated atmospheric oxidation mechanisms for methoxyflurane (CH3OCF2CHCl2) in 700 Torr of air or O2 diluent at 296 K. The oxidation of CH3OCF2CHCl2 in both air and O2 diluent gave one primary carbonyl-containing product in approximately 100% yield and one secondary bi-carbonyl product in addition to COF2 and COCl2, the latter two both with initial molar yields of 2 ± 1%. A mechanism is proposed for the oxidation of methoxyflurane which explains the observed product distribution. IR spectra for HC(O)OCF2CHCl2 and HC(O)OCF2C(O)Cl are calculated and reported.