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- W2324212275 abstract "A pulse radiolysis technique was used to measure the UV absorption spectra of CH2ClCHCl and CH2ClCHClO2 radicals over the range 230−300 nm. At 250 nm, σ(CH2ClCHCl) = (1.7 ± 0.2) × 10-18 and σ(CH2ClCHClO2) = (3.5 ± 0.5) × 10-18 cm2 molecule-1. The observed self-reaction rate constant for CH2ClCHCl radicals, defined as −d[CH2ClCHCl]/dt = 2k4[CH2ClCHCl]2 was k4 = (2.0 ± 0.3) × 10-11 cm3 molecule-1 s-1. The rate constant for reaction of CH2ClCHCl radicals with O2 in one bar of SF6 diluent was (2.4 ± 0.3) × 10-12 cm3 molecule-1 s-1. The rate constants for the reactions of CH2ClCHClO2 radicals with NO and NO2 were k5 ≥ 9 × 10-12 and k6 = (9.8 ± 0.6) × 10-12 cm3 molecule-1 s-1, respectively. The rate constant for the reaction of F atoms with CH2ClCH2Cl was k3 = (2.6 ± 0.2) × 10-11 cm3 molecule-1 s-1. The reaction of CH2ClCHClO2 radicals with NO produced NO2 and, by implication, CH2ClCHClO radicals. A FTIR spectroscopic technique showed that CH2ClCHClO radicals undergo both reaction with O2 and decomposition via intramolecular 3-center HCl elimination. In 700 Torr of air at 296 K the rate constant ratio kO2/kdecomp = (2.3 ± 0.2) × 10-20 cm3 molecule-1. A lower limit of 4 × 105 s-1 was deduced for the rate of intramolecular 3-center HCl elimination from CH2ClCHClO radicals at 296 K in 1 bar of SF6 diluent. As part of this work a relative rate technique was used to measure rate constants of (1.3 ± 0.2) × 10-12 and (6.4 ± 1.4) × 10-14 cm3 molecule-1 s-1 for the reactions of Cl atoms with CH2ClCH2Cl and CH2ClC(O)Cl, respectively. All experiments were performed at 296 K. Results are discussed in the context of the atmospheric chemistry of 1,2-dichloroethane." @default.
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- W2324212275 date "1996-01-01" @default.
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- W2324212275 title "Atmospheric Chemistry of 1,2-Dichloroethane: UV Spectra of CH<sub>2</sub>ClCHCl and CH<sub>2</sub>ClCHClO<sub>2</sub> Radicals, Kinetics of the Reactions of CH<sub>2</sub>ClCHCl Radicals with O<sub>2</sub> and CH<sub>2</sub>ClCHClO<sub>2</sub> Radicals with NO and NO<sub>2</sub>, and Fate of the Alkoxy Radical CH<sub>2</sub>ClCHClO" @default.
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- W2324212275 doi "https://doi.org/10.1021/jp952149g" @default.
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