Electron Spin Resonance of Transient Radicals during Pyrolysis and Photolysis. Benzyl Ether

Article abstract of DOI:10.1021/j100229a030

Benzyl ether has been pyrolyzed at 452, 474, and 497 deg C at a pressure of 20.7 MPa.Benzyl has been observed by ESR, and product analyses have been made.The reaction is part of a proposed scheme.This reaction was separately studied photolytically by preparing the reactant radical with benzyl ether and an initiator in benzene solution.Measurement from 105 to 155 deg C at 6.9 MPa gave an activation energy of 15.5 kcal/mol (+/-15percent) and an estimate of the Arrhenius A factor of 1E12 s^-1.The varous results are discussed in terms of a free-radical chain reaction.Methylcyclohexadienyl was also prepared, and ESR parameters are given.