Kinetics of the NCN Radical

The kinetics of the NCN + NO reaction has been studied using laser-induced fluorescence spectroscopy over the temperature range 298−573 K to measure total rate constants and time-resolved infrared diode laser spectroscopy as a probe for possible products. The reaction has a rate constant of k(NCN + NO) = (2.88 ± 0.2) × 10-13 cm3 molecule-1 s-1 at 298 K and low (∼3 Torr) total pressure. The rate constant displays both a temperature as well as a pressure dependence, indicating that adduct formation is a major product channel. Only very small amounts of other products were detected. Upper limits for the low-pressure rate constants of NCN + O2, C2H4, and NO2 were also obtained.