Showing papers by "Thomas Bally published in 1987"

ESR characterization of ring-closed oxirane radical cations via a novel alternating line width effect

Abstract: There is considerable experimental evidence supported by numerous theoretical studies to show that the radical cation formed from oxirane under both gas-phase and solid-state conditions is the planar C...C ring-opened oxallyl isomer. In fact, the low barrier to the isomerization usually dictates that only the ring-opened form can be detected spectroscopically from monocyclic and bicyclic oxiranes at 77 K. These elusive cyclic cations should be accessible, however, in polycyclic oxiranes where steric constraints prevent C...C opening of the oxirane ring, and here the authors report the first ESR characterization of ring-closed oxirane cations with a one-electron C-C bond.