Small Organic Peroxy Radicals – Table 9

Figure 8. Reaction 10 CH3C(O)O2 + CH3O2

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Table 9. Reaction 10 CH3C(O)O2 + CH3O2

Reference Branching ratio for channel (10a) at 298 K used in analyses k298a Aa E/R (K) Temp range(K) Method
Addison et al. (1980) 0.3 298 MMS-UV
Moortgat et al. (1989) 0.47 1.4
(1.3)b
≈0 253-373 FP-UV
Roehl et al. (1996) 0.9 0.98 298 LP-UV
Maricq and Szente (1996) ≈0 0.97 0.085 -726 209-358 LP-UV/IR
Villenave and Lesclaux (1996) 0.47 0.82 298 FP-UV
Recommended 0.9 1.1 (1.5)c 0.2 -500±250d

a) units of 10-11 cm3molecule-1s-1; b) Reanalyzed using the cross section values recommended in the present evaluation; c) Uncertainty factor; d) Due to large uncertainties on both branching ratios and kinetics, a temperature dependence cannot be recommended at the present time (see text); an exponential factor of the Arrhenius expression close to that observed for the CH3C(O)O2 self reaction is suggested.