Experimental Determination of the OH Product Yield from NH2 + NO at 300 K

Article abstract of DOI:10.1021/j100283a025

The branching ratio, α = k_1b/k_1a, has been experimentally determined at 300 K for two product channels of the NH2 + NO reaction: -->N2 + H2O (k_1a) and --> N2H + OH (k_1b).The reaction was studied in a fast-flow tube reactor coupled to a modulated-beam mass spectrometer.CO was added to scavenge hydroxyl radicals via OH + CO --> CO2 + H.Separate experiments and kinetic modeling results confirm that the scavenging efficiency is near unity so that is a good measure of .The branching ratio, α = / = /, was determined from CO2⁺ and H2O⁺ ion intensities to be < 0.15 at 300 K.This result is discussed as it relates to previous measurements and to the atmospheric chemistry of ammonia.