Kinetics of the reaction of C2H5O2 with NO at 295 K

The reaction of C₂H₅O₂ with NO in helium carrier gas at 295 K with [He] = 1.6 × 10¹⁷ cm^?3 has been studied using a gas flow reactor sampled by a mass spectrometer. Because no parent molecular ion or suitable fragment ion produced by C₂H₅O₂ could be detected, the reaction was followed by measuring the formation of NO₂. In so doing, account had to be taken of the small amount of HO₂ known to be present in the reaction mixture, which also leads to NO₂ on reaction with NO. The rate coefficient for the total reaction of C₂H₅O₂ with NO was found to be (8.9 ± 3.0) × 10^?12 cm³/s, and the path which produces NO₂ was found to account for at least 80% of all C₂H₅O₂.