Alkyl nitrate formation from the reaction of a series of branched RO2 radicals with NO as a function of temperature and pressure |
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| Authors: | Roger Atkinson Sara M Aschmann Arthur M Winer |
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| Institution: | 1. Statewide Air Pollution Rescarch Center, University of California, 92521-0312, Riverside, CA, USA
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| Abstract: | Alkyl nitrate yields from the NO x photooxidations of neopentane, 2-methylbutane and 3-methylpentane have been determined over the temperature and pressure ranges 281–323 K and 54–740 torr, respectively. The formation of the alkyl nitrates is attributed to the reaction pathway (1b) $${\text{RO}}_{\text{2}} + {\text{NO}}^{{\text{ }}\underrightarrow {\text{M}}} {\text{ RONO}}_{\text{2}}$$ and rate constant ratios k 1b/(k 1a+k 1b) are estimated, where (1a) is the reaction pathway (1a) $${\text{RO}}_{\text{2}} + {\text{NO}} \to {\text{RONO}}_{\text{2}} .$$ A method for estimating this rate constant ratio for primary, secondary and tertiary alkyl peroxy radicals is presented. |
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