A NOVEL ORTHO-SUBSTITUENT EFFECT ON FORMATION OF VINYL CATIONS IN THE PHOTOLYSIS OF VINYL BROMIDES

Article abstract of DOI:10.1246/cl.1982.643

Introduction of a substituent into ortho-position of β-aryl group in a vinyl bromide resulted in the preferential formation of a vinyl cation in the photolysis.It is considered that the steric repulsion of β-aryl groups makes a convenient conformation for an electron transfer from the aromatic ring to the halogen atom in the radical pair.