Substituent effects in five-membered rings: σHet constants for thia- and oxa-substituents from the reaction of arenesulphonyl chlorides with aniline
Abstract
σHet Values for thia- and oxa-substituents in five-membered heterocycles are derived from the rate constants for the reactions of suiphonyl chlorides with aniline in methanol. These values, which are negative and similar to σ+, are in agreement with the SAN mechanism previously proposed.
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