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• W2048257177 abstract "Abstract The decomposition of gaseous dioxygen difluoride (FOOF) and dioxygen fluoride (FOO) to F2 and O2 at ambient temperature has been studied by electron paramagnetic resonance (EPR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy and transient gas pressure measurements. The formation of oxygen in FOOF/FOO gas mixtures, as demonstrated by stopped-flow EPR, was first-order under low- pressure conditions (1–10 Torr) with rate constants in the range of 0.1–0.2 s−1, depending upon wall materials. EPR spectroscopy detected neither F atoms nor FOO radicals as intermediates despite the presence of FOO radicals shown by complementary FT-IR experiments. The FT-IR spectra of gaseous FOOF undergoing decomposition at ambient temperature showed prominent, isolated bands near 1210 cm−1 (FOOF) and near 1490 cm−1 (FOO). Overlapping bands attributable to both species were seen near 650 cm−1, and weak features appeared elsewhere. At nominal initial FOOF/FOO pressures of 4–20 Torr, results from stopped-flow FT-IR kinetics analysis using these bands generally agreed with the EPR results and yielded first-order rate constants of 0.12 ± 0.01 s−1 and 0.22 ± 0.03 s−1, respectively, for FOO and FOOF disappearance. Oxygen-carrier FT-IR experiments strongly suggested that a reversible reaction between FOOF and O2 forms FOO (Keq≈ 0.018), and that this reaction was rapid relative to FOOF/FOO decomposition. Analysis of the stopped-flow FT-IR results yielded infrared peak absorptivities for FOOF absorption at 1205 cm−1 of 1.8 ± 0.4 × 10−3 (Torr cm)−1 and for FOO absorption at 1486 cm−1 of 3.5 ± 1 × 10−3 (Torr cm)−1. The observed kinetics are discussed in terms of the possible decomposition reaction mechanisms." @default.
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• W2048257177 date "1995-08-01" @default.
• W2048257177 modified "2023-09-26" @default.
• W2048257177 title "Thermal decomposition reactions of gaseous dioxygen difluoride and dioxygen fluoride at ambient temperature" @default.
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• W2048257177 doi "https://doi.org/10.1016/0022-1139(95)03230-b" @default.
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