Kinetics and Mechanism of the CH + N2 Reaction. Temperature- and Pressure-Dependence Studies and Transition-State-Theory Analysis

Article abstract of DOI:10.1021/j100243a028

The reaction CH + N2 -> products was studied at 297 K at total pressures between 25 and 787 torr.The second-order reaction rate constant was found to be pressure dependent, varying by a factor of 9.6 in this range.This reaction was also studied in the range 297-675 K at 100-torr total pressure.The rate constant decreases with increasing temperature and cannot be adequately described by a linear fit in this range.Transition-state-RRKM-theory calculations for the reaction proceeding through a long-lived intermediate, HCN2, successfully describe the data.Stabilization of the adduct is the primary reaction channel at lower temperatures while metathesis dominates above 1000 K.These calculations provide a consistent description of these and previous data from flame studies.