The Reaction of NH2 with O

Article abstract of DOI:10.1021/j100073a016

The reaction between atomic oxygen and the amidogen radical, NH2, has been studied at 295 K by infrared kinetic spectroscopy.The NH2 radical was produced by excimer laser photolysis of NH3 at 193 nm and reacted with O atoms produced by a microwave discharge of dilute O2/He mixtures.IR transient absorptions of NH2, and of NH and OH radicals formed as reaction intermediates, were monitored using a tunable infrared colorcenter laser.The room-temperature rate constant for the overall reaction was measured as (6.5 +/- 1.3)E-11 cm³ molecule^-1 s^-1.The minor channel leading to NH + OH was observed but accounted for at most about 8percent of the NH2 reacting.The rate constant for the reaction NH + O was determined from fitting the NH time profile to be (6.6 +/- 1.5)E-11 cm³ molecule^-1 s^-1.