Kinetics of the reaction of C 2 H 5 O 2 with NO at 295 K

The reaction of C 2 H 5 O 2 with NO in helium carrier gas at 295 K with [He] = 1.6 × 10 17 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 C 2 H 5 O 2 could be detected, the reaction was followed by measuring the formation of NO 2 . In so doing, account had to be taken of the small amount of HO 2 known to be present in the reaction mixture, which also leads to NO 2 on reaction with NO. The rate coefficient for the total reaction of C 2 H 5 O 2 with NO was found to be (8.9 ± 3.0) × 10 −12 cm 3 /s, and the path which produces NO 2 was found to account for at least 80% of all C 2 H 5 O 2 .