| Abstract
| - Kinetic data indicate that the hydrolysis of S-2,4-dinitrophenyl 4‘-hydroxythiobenzoate in mild alkaline solutions (pH8−11) most likely follows a dissociative, E1cB pathway,through a p-oxoketene intermediate, whereas at higher pHvalues an associative mechanism carries the reaction flux.Free linear energy relationships obtained from a kineticstudy on the alkaline hydrolyses of substituted S-aryl 4‘-hydroxythiobenzoates seem to suggest that the associativepathway is a concerted, one-step process, rather than theclassical mechanism via a tetrahedral intermediate.
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