Kinetics of the Conformer Reactions: II. Significance of Media in the Electrophilic addition Reactions

The kinetics of electrophilic addition reaction of bromine to a multiple bond in a series of con-formationally unhomogenous 2-substituted 1'3-dioxa-5-cycloheptenes was studied. We found that the com-pounds with trans structure are formed. The partial reaction rate constant for chair, twist forms, thereaction susceptibility parameters to the substituent electronic effect at the C2atom are obtained. Relativereactivity of the alternative steric structures is defined by the specific solvation of the substrate. The result obtained are compared with those achieved without accounting for conformational term.