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Absolute rate constants are reported for the reaction of fluorine atoms with nitric oxide in the presence of the third bodies Ar, He, Ne, N2, NO, CO2, CF4, SF6, and C2F6. The values determined in the present study are compared to those found for reactions of Cl, H, and O with NO.

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Absolute rate constants for the reaction of ground state oxygen atoms with formaldehyde were determined over the temperature range 298 to 748 K using the discharge flow-resonance fluorescence technique. The results were combined with rate data from a flash photolysis-resonance fluorescence study (250 to 498 K) of this reaction to obtain an Arrhenius expression that is linear from 250 to 748 K: k1(T) = (2.94±0.26) ×10−11 exp  (−3065±67/RT) cm3 molecule−1 s−1. This result is compared with those of previous studies and possible kinetic complications are discussed in terms of a detailed mechanism. The significance of an extrapolation of this determination of k1 to higher and lower temperatures is also discussed.