Abstract:
The reaction of oxygen atoms with methyl nitrate and with ethyl nitrate have been studied in a discharge–flow system at temperatures between 294 and 473 K. The initial attack involves abstraction of a hydrogen atom for which the rate expressions are shown to be 1.5 × 1010 exp (–22.0 ± 1.0 kJ mol–1/RT) dm3 mol–1 s–1 and 2.6 × 1010 exp (–21.6 ± 2.6 kJ mol–1/RT) dm3 mol–1 s–1 respectively. The activation energy for hydrogen abstraction is not reduced by the fact that the initially formed radical ruptures exothermically to yield an aldehyde plus nitrogen dioxide.
