Abstract
The pulsed laser photolysis (PLP), time-resolved saturated laser-induced fluorescence (SLIF) technique has been used to study the reaction CH+CO+M⇒HCCO+M (1) in the temperature range between 300–800 K and at total pressures between 4 and 160 bar helium. The CH radicals have been generated using UV-multiphoton dissociation of CHBr3 at 248 nm. In the investigated temperature and pressure range, the usual falloff behavior of the reaction has been found. Falloff curves have been constructed and a high-pressure limiting rate constant with a weak negative temperature dependence of k1,∞=1.7×10−10(T/300 K)−0.4 cm3 molecule−1 s−1 has been extracted. This high-pressure limiting rate constant has been treated in terms of the statistical adiabatic channel model. Isobar Arrhenius curves have been constructed for pressures between 0.01 and 100 bar, including the formation of C2O+H at high temperatures.
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