The ortho:para ratio in aromatic nucleophilic substitution. Part II

Abstract

The Arrhenius parameters for the reactions of the eight o- and p-halogenomononitrobenzenes with methoxide and ethoxide ions have been determined. The Arrhenius parameters for the reactions of o- and p-fluoronitrobenzenes with isopropoxide ions in isopropyl alcohol and phenoxide ions in methyl, ethyl, and isopropyl alcohols have also been measured. The results are discussed in terms of steric factors operating in the transition states of the ortho-isomers.