Studies of the acid-catalyzed hydrolysis of dimethyl N-(alkylpheny1) phosphroamidates demonstrate that the LFER between observed rates and basicities of the leaving amines is different for meta/para-and for orthosubstituted derivatives (slopes of log how vs. pK, are 0.4 and 0.9, respectively). Since the AS* values and KSIE determined are approximately constant irrespective of the position of an alkyl group, the observed change in the slope of ...