Journal of the Chemical Society. Perkin transactions II p. 1103 - 1106 (1986)
Update date:2022-08-16
Topics:
Hopf, Henning
Wachholz, Gerhard
Walsh, Robin
The pyrolysis of 1,2-dimethylcyclopropene has been studied in the temperature range 260-300 oC.The sole product is isoprene and material recovery was complete to within +/- 3.5percent.The reaction obeyed first-order kinetics and appeared to be homogeneous in a hexamethyldisilazane-conditioned Pyrex reactor, although surface catalysis could not be eliminated in a packed vessel.At 12 Torr (close to the high-pressure limit) rate constants fitted the Arrhenius equation (i).This study provides further evidence for the log(k/s-1) = (13.63 +/- 0.19) - (183.7 +/- 2.0kJmol-1)/RTln10 (i) deactivating effect of methyl substituents on cyclopropene isomerization.
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