Enhanced reactivity of exo-norbornyl derivatives. Evidence for σ-participation in the absence of steric effects
Abstract
Determinations of the vertical ionization potentials by He I photoelectron spectroscopy and the rates of electrophilic cleavage of exo- and endo-2-norbornyl-methylmercury are consistent with enhanced σ-participation as a mode of charge delocalization in the exo epimer.