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- W2330205207 abstract "FTIR-smog chamber techniques were used to determine rate constants for the gas-phase reaction of Cl and F atoms with CH3C(O)C(O)CH3 and F atoms with CH3C(O)F of (4.0 ± 0.5) × 10-13, (4.9 ± 0.7) × 10-11, and (3.6 ± 0.4) × 10-12 cm3 molecule-1 s-1, respectively. Two pathways for the reaction of Cl and F atoms with CH3C(O)C(O)CH3 were found: (1a) Cl + CH3C(O)C(O)CH3 → HCl + CH3C(O)C(O)CH2·, (1b) Cl + CH3C(O)C(O)CH3 → CH3C(O)Cl + CH3C(O)·, (2a) F + CH3C(O)C(O)CH3 → HF + CH3C(O)C(O)CH2·, (2b) F + CH3C(O)C(O)CH3 → CH3C(O)F + CH3C(O)·, with branching ratios of k1b/(k1b + k1a) = 0.23 ± 0.02 and k2b/(k2b + k2a) = 0.56 ± 0.09. It was determined that the atmospheric fate of CH3C(O)C(O)CH2O· radicals is decomposition to give HCHO, CO, and CH3C(O)· radicals. Pulse radiolysis coupled to UV absorption spectroscopy was used to study the kinetics of the reaction of F atoms with CH3C(O)C(O)CH3 as well as spectra of CH3C(O)C(O)CH2· and CH3C(O)C(O)CH2O2· radicals over the wavelength range 220−400 nm at 295 K. The rate constant for the reaction of F atoms with CH3C(O)C(O)CH3 was determined to be (4.6 ± 0.8) × 10-11 cm3 molecule-1 s-1. The absorption cross sections of CH3C(O)C(O)CH2· and CH3C(O)C(O)CH2O2· radicals were (5.4 ± 1.0) × 10-18 at 250 nm and (2.0 ± 0.5) × 10-18 cm2 molecule-1 at 320 nm, respectively. Results are discussed with respect to the available database concerning the reaction of Cl and F atoms with organic compounds." @default.
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- W2330205207 date "1998-10-16" @default.
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- W2330205207 title "Kinetics and Mechanism of the Reactions of 2,3-Butadione with F and Cl Atoms, UV Absorption Spectra of CH<sub>3</sub>C(O)C(O)CH<sub>2</sub>· and CH<sub>3</sub>C(O)C(O)CH<sub>2</sub>O<sub>2</sub>· Radicals, and Atmospheric Fate of CH<sub>3</sub>C(O)C(O)CH<sub>2</sub>O· Radicals" @default.
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- W2330205207 doi "https://doi.org/10.1021/jp982431y" @default.
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