KINETICS OF THE THERMAL GAS-PHASE ISOMERIZATION OF EPOXYPROPANE IN A SINGLE-PULSE SHOCK TUBE

The kinetics of the gas-phase thermal isomerization of epoxypropane has been studied over the toraperative range 1045-1175K in a single-pulse shock tube. Unimolecular isomerizations to propionaldehyde, acetone, methyl vinyl ether and allylol account for about 05% of the primary reactions which occur by first order, homogeneons, non-radical processes. Secondary reactions, that make quantitative determination of the individual rate constants difficult, were reduced by the addition of radical scavenger nitric oxide. (sic) (s(-1)) = 10(14.3)exp(-262kJmol(-1)/RT) (sic) (s(-1)) = 10(14.0)exp(-268kJmol(-1)/RT) (sic) (s(-1)) = 10(13.4)exp(-264kJmol(-1)/RT) (sic) (s(-1)) = 10(13.0)exp(-275kJmol(-1)/RT) A biradical mechanism for the isomerization of epoxypropane has been preferred. It adequately explained kinetic observations. The RRKM theory of unimolecular reactions was applied to explain the thermal isomerization of epoxypropane.Chemistry, PhysicalSCI(E)中国科学引文数据库(CSCD)0139-45