Rate correlations involving the linear combination of substituent parameters. Part III. Reactions of picryl chloride with substituted phenoxide ions and anilines

Abstract

The reactions of picryl chloride with meta- and para-substituted phenoxide ions and anilines have been followed conductimetrically. Specific rates, activation energies, and activation entropies have been evaluated. The rates for electron-withdrawing para substituents correlate better with a four parameter equation involving σ and σ^– than with the standard Hammett equation.