Kinetics and oxidation mechanism of cyclopentadiene behind the shock waves

Abstract.

Oxidation of cyclo-C₅H₅ was investigated by monitoring O atoms and also CO molecules behind the reflected shock of cyclo-C₅H₆ / O₂ /Ar and C₆H₅OCH₃ /O₂ /Ar mixtures. In both mixtures we could observe the formation of O atoms produced by the reaction of cyclo-C₅H₅ + O$_{2 }\to$ cyclo-C₅H₅O + O and from the kinetic analysis of these time profiles the rate constant for this reaction was determined to be $k = 8.5 \times 10^{14 }\exp (-117.0$ kJ/RT) cm³ mol^-1 s^-1. The possibility of CO formation by the reaction of cyclo-C₅H₅O $\to$ C₄H₅ + CO was also investigated but because of the subsequent reactions forming CO molecules no direct information for the reaction of cyclo-C₅H₅O $\to$ C₄H₅ + CO was derived.