Rate-Determining Step in an ElcB Mechanism Aminolysis of Sulfamate Esters

Change in Rate-Determining Step in an ElcB Mechanism Aminolysis of Sulfamate Esters 

To solve this question, a kinetic study was carried out wifli NPBS and a series of alicyclic amines 3-6. The study revealed that the reaction behaves in a different way regarding the type of amine employed. The structures of amines 3-6 togetiier wi their p a values are indicated in Fig. 17.1 ( a is the acidity constant of the conjugate acid of the bases employed). 

Considering the experimental data and the values of the activation parameters propose the type ofElcB mechanism that is operative for this process. 

The general rate law followed for the aminolysis reactions studied in this work has the form  

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