ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 9, Number 1
JKCSEZ 9(1)
February 20, 1965 

Halogen exchanges between benzyl chloride and chloride ion have been studied in 90% ethanol-water mixture, and activation parameters in the exchange reaction have been determined; ΔH≠ = 18. 50 Kcal and ΔS≠ = -22. 09 e. u. Results indicated that the reaction proceeded via a typical bimolecular mechanism. The importance of nucleophilic ability of attacking anion in SN2 process has been stressed giving some experimental evidence. The order of reactivity of halides in the exchange reaction is better explained with the Swain's nucleophilic parameter than with the bond dissociation energies.