Concerted and non-concerted transformations of cyclopropyl to allyl; the solvolysis of endo- and exo-7-chloro-7-p-substituted-phenylbicyclo[4,1,0]heptanes

Abstract

Activation parameters have been obtained for the acetolysis of epimeric 7-chloro-7-p-substitutedphenylbicyclo[4,1,0]heptanes; the evidence suggests concerted dis(2) and non-concerted dis(0) modes of ring opening for the endo- and exo-chloro-epimers, respectively.