Mechanism and rate constants for the reactions of hydrogen atoms with isobutene at high temperatures

摘要: Hydrogen atoms from the thermal decomposition of 2,3,3 trimethylbutanol-2 have been used to induce isobutene in single pulse shock tube experiments. We able observe products arising all high, temperature reaction channels for hydrogen attack on isobutene. The following rate expressions determined. k (H+isobutenepropylene+CH 3 )=1.72×10 10 Exp(−1808/T) 1/mol-s and (H+isobutener-methyl-2-allyl+H 2 11 Exp(−4024/T) range 1000–1180 K at 2.5–3 atmospheres pressure. constants abstraction vinylic hydrogens are not more than 8% that allylic hydrogens. Comparisons made with similar processes involving branched aromatics lower results Interesting correlations observed lead possibility estimating reactions other olefins.