The Reactions of RO2 with NO3
On the basis of reported information, these reactions
are assumed to proceed via a single channel, as follows:
RO2 + NO3 → RO + NO2 (1)
Based on the data of Biggs et al. (1994),
Daele et al. (1995) and
Helleis et al. (1996),
a value of k1 = 1.1 × 10-12 cm3 molecule-1 s-1
is assigned to the reaction involving CH3O2.
A value of 2.5 × 10-12 cm3 molecule-1 s-1
is used for C2H5O2, (based on the reported coefficients of
Biggs et al., 1995 and
Ray et al., 1996),
and this value is also used for the reactions of non-acyl peroxy radicals with NO3 in general.
The rate coefficients for reactions of acyl peroxy radicals are assigned a value of
k1 = 4.1 × 10-12 cm3 molecule-1 s-1,
based on the reported value for CH3C(O)O2
(Canosa-Mas et al., 1996).