Kinetics of the CN+CH2CO and NCO+CH2CO reactions Original Research Article

The CN+CH2CO and NCO+CH2CO reactions were studied over the temperature ranges 296–567 K and 296–556 K, respectively, using time-resolved infrared diode laser absorption and visible laser-induced fluorescence spectroscopy. The total rate constant data were fit to the following expressions: k1(CN+CH2CO) = (2.37±0.5)×10−11 exp[552.6±97/T] and k2(NCO+CH2CO) = (1.71±0.27)×10−12 exp[713.2±56/T] cm3 molecule−1 s−1. Detection and quantification of CO product yields suggests that an addition–elimination mechanism producing CH2CN+CO or CH2NCO+CO dominates these reactions, and that hydrogen abstraction to produce HCN+HCCO or HNCO+HCCO is a minor or negligible product channel.