Nuclear magnetic resonance studies. XX. Structures and 1H nuclear magnetic resonance parameters of the bromination products of some substituted bicyclo[2.2.2]octenes

The stereochemical course of the reaction of some 7,8-dicarboxylate derivatives of 1,3,5,5-tetramethyl-bicyclo[2.2.2]oct-2-ene with bromine has been established. The proton magnetic resonance parameters of these products are discussed.