Thermalisomerization of [1.1.1]propellane in a flow system at 370°C led to a 3:2 mixture of bicyclo[5.1.0]octa-1,6-diene () and 6-vinylidenebicyclo[3.1.0]hexane (). At 430°C, propellanes and were converted into 1,2-divinylcyclopropene (), and, respectively, into dimethylenecyclopropane ().
Kinetics and Mechanism of the Thermal Rearrangement of [1.1.1]Propellane
作者:Oliver Jarosch、Robin Walsh、Günter Szeimies
DOI:10.1021/ja994043v
日期:2000.9.1
kinetics of the thermal rearrangement of [1.1.1]propellane (1) have been investigated by gas-phase pyrolysis in a stationary system. The unimolecularreaction leads to dimethylenecyclopropane (2) and its thermal isomerization product ethenylidenecyclopropane (5) with the following Arrheniusparameters: log(A/s-1) = 14.02 ± 0.23; EA/kcal mol-1 = 39.66 ± 0.52. Furthermore, it was shown that the minor