TEMPERATURE-DEPENDENCE OF THE REACTION HO2+NO-]OH+NO2

The title reaction has been studied using laser magnetic resonance detection of HO2 radicals in a discharge flow system. For the range 403 > T > 232 K, k1 = (7.9±1) (T/300)-0.83±0.18 × 10-12 cm3 molecule-1 s-1. Upper limits are placed on the rate constants for the reactions of (HO2 + NO) that yield HNO and HOONO:k < 0.0012 k1. Measurements have also been made that indicate that the reactions of HO2 with CO and N2O are very slow at 300 K. These rate constants are less than about 5 × 10-17 cm 3 molecule-1 s-1. © 1979 American Institute of Physics.