SUMMARY

This thesis entitled comprises four chapters and ends with alist of references.

The first chapter covers the literature up to date of the reaction of nucleophilic substitution reactions and their different mechanisms.then describes .of preparation of the methods

the procedure used to determina the rate constant for the reaction and kinetic data

then deals the discussion and interpretation of the results from the above mentioned reaction .

application of Hammett relationship . and application of Bronsted equation