The π advanced then breaks down to provide the bromonium ion. A correct cure from the orbitals would thus not strictly be from the alkene and Br2, but with the orbitals within the π advanced itself. The predominance of allylic substitution about other positions is predicated on bond dissociation energies. https://bromuration69269.blogs-service.com/68497190/indicators-on-bromazolam-what-is-it-you-should-know