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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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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

$${\text{RO}}_{\text{2}} + {\text{NO}}^{{\text{ }}\underrightarrow {\text{M}}} {\text{ RONO}}_{\text{2}}$$
((1b))

and rate constant ratios k 1b/(k 1a+k 1b) are estimated, where (1a) is the reaction pathway

$${\text{RO}}_{\text{2}} + {\text{NO}} \to {\text{RONO}}_{\text{2}} .$$
((1a))

A method for estimating this rate constant ratio for primary, secondary and tertiary alkyl peroxy radicals is presented.

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References

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Atkinson, R., Aschmann, S.M. & Winer, A.M. Alkyl nitrate formation from the reaction of a series of branched RO2 radicals with NO as a function of temperature and pressure. J Atmos Chem 5, 91–102 (1987). https://doi.org/10.1007/BF00192505

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Key words

  • Alkane
  • alkyl nitrate
  • tropospheric chemistry
  • nitrogen oxides
  • alkyl peroxy radical