Journal of Physical Chemistry A, Vol.102, No.24, 4592-4595, 1998
A diode laser study of the product branching ratios of the CH+NO2 reaction
The reaction of CH radicals with NO2 was studied at 296 K using multiphoton photolysis of CHBr3 at 248 nm, followed by time-resolved infrared diode laser detection of reaction products. CO, CO2, and NO were detected in significant yield, while DCN (from CDBr3), N2O, HCNO, and HNCO were formed in undetectably low yields. On the basis of consideration of product yields and secondary chemistry, we find that the major product channel is H + CO + NO or HNO + CO, which together account for 92 +/- 4% of the total rate constant. HCO + NO is a minor product channel, accounting for 8 +/- 4%. Upper limits are estimated for several other product channels.
Keywords:CH RADICAL REACTIONS;RATE CONSTANTS;TEMPERATURE-DEPENDENCE;ELEMENTARY REACTIONS;REACTION-KINETICS;ROOM-TEMPERATURE;NO;N2O;O-2;COMBUSTION