Pressure Dependence of Iso-Propyl Nitrate Formation in the i-C3H7O2 + NO Reaction

Abstract : The branching ratio β = k1b/k1a for the formation of iso-propyl nitrate, i-C3H7ONO2, in the gas-phase reaction of i-C3H7O2 with NO, i-C3H7O2 + NO → i-C3H7O + NO2 (1a), i-C3H7O2 + NO → i-C3H7ONO2 (1b), was determined over the pressure range 55-500 Torr at 298 K using a high-pressure turbulent flow reactor coupled with a chemical ionization quadrupole mass-spectrometer. The β coefficient was found to increase linearly with pressure from about 0.6% at 55 Torr to about 3% at 500 Torr. The atmospheric implication of the results obtained is briefly discussed.
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Nadezhda I. Butkovskaya, Alexandre Kukui, Georges Le Bras. Pressure Dependence of Iso-Propyl Nitrate Formation in the i-C3H7O2 + NO Reaction. Zeitschrift für Physikalische Chemie, Oldenbourg Verlag, 2010, 224 (7-8), pp.1025-1038. ⟨10.1524/zpch.2010.6139⟩. ⟨hal-00574579⟩

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