The reaction of
propene (CH(3)CH═CH(2)) with
hydrogen atoms has been investigated in a heated single-pulsed
shock tube at temperatures between 902 and 1200 K and pressures of 1.5-3.4 bar. Stable products from H atom addition and H abstraction have been identified and quantified by gas chromatography/flame ionization/mass spectrometry. The reaction for the H addition channel involving methyl displacement from
propene has been determined relative to methyl displacement from
1,3,5-trimethylbenzene (135TMB), leading to a reaction rate, k(H +
propene) → H(2)C═CH(2) + CH(3)) = 4.8 × 10(13) exp(-2081/T) cm(3)/(mol s). The rate constant for the abstraction of the allylic
hydrogen atom is determined to be k(H +
propene → CH(2)CH═CH(2) + H(2)) = 6.4 × 10(13) exp(-4168/T) cm(3)/(mol s). The reaction of H +
propene has also been directly studied relative to the reaction of H +
propyne, and the relationship is found to be log[k(H +
propyne →
acetylene + CH(3))/k(H +
propene →
ethylene + CH(3))] = (-0.461 ± 0.041)(1000/T) + (0.44 ± 0.04). The results showed that the rate constant for the methyl displacement reaction with
propene is
a factor of 1.05 ± 0.1 larger than that for
propyne near 1000 K. The present results are compared with relevant earlier data on related compounds.