In the mid-1980s, his group demonstrated that, even in simple cases, the bromonium ion
intermediates were reversibly formed.
So did the segment on stereospecific additions to cis- and trans-2-butene through a bromonium ion
intermediate, which can be very difficult for a student to understand.
His work in the area of electrophilic halogenation of olefins has centered mainly on the isolation and structural characterization of stable bromonium ions
, and the determination of the factors that influence their partitioning in solution.