1501-60-6Relevant articles and documents
Gas-Phase Pyrolysis Kinetics of 5-Acetoxy-2-methylpent-2-ene
Chuchani, Gabriel,Martin, Ignacio,Alonso, Miguel E.
, p. 1241 - 1243 (1981)
The kinetics of the gas-phase pyrolysis of 5-acetoxy-2-methylpent-2-ene has been measured over the temperature range 330-380 deg C and pressure range 53-210 torr.The reaction, in a static system seasoned with allyl bromide, and in the presence of propene inhibitor, is homogeneous, obeys a first-order law, and is unimolecular.The rate constants are given by the Arrhenius equation log k(s-1) = (13.21+/-0.14)-(199.6+/-1.7)kJ mol-1(2.303RT)-1.The presence of the (CH3)2C=CH group at the β-carbon atom of ethyl acetate does not provide anchimeric assistence in the elimination of this ester.A simultaneous effect of both steric acceleration and the allylic weakening of the β hydrogen appears to cause a slight rate enhancement of the Z=(CH3)2C=CH group relative to Z=CH2=CH group in the pyrolysis of ZCH2CH2OAc.
The Kinetics of Pyrolysis of 1,3,3-Trimethylcyclopropene. Evidence for the Involvement of Alkylidene Carbenes in the Thermal Isomerisation of Cyclopropenes
Walsh, Robin,Wolf, Christian,Untiedt, Sven,Meijere, Armin de
, p. 421 - 422 (1992)
A low yield of 4-methylpent-2-yne in the gas-phase isomerisation of 1,3,3-trimethylcyclopropene is shown to be more consistent with an alkylidene carbene transient than with a 1,3-biradical intermediate.
