ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 23, Number 4
JKCSEZ 23(4)
August 20, 1979 

Kinetics of the reaction of phenethyltosylate with substituted pyridines at 50, 60 and 70℃ in acetonitrile were investigated by an electric conductivity method. The effects of substituents on the reaction of phenethyltosylate with pyridines were discussed. The rates of reaction were increased with electron donating power of substituents of pyridines. The isokinetic relationship was shown Eα and ΔS≠, it's temperature was 240。K. Bronsted plots were excellent linear except for 4-amino pyridine given by the following equation, logk=O. 22pKa-3.71 (r=O. 986). According to a plot of log k against Hammett substituent constants, the Iinearity was good except for bamino pyridine too, log k= -1.330+0.08 (r= -0.987). In both cases, deviation of 4-amino pyridine from linearity was considered to solvent effect, resonance effect and 0 value itself. From all the above results, this reaction was found typical SN2 reaction which the rates of reaction was determined by C…N bond formation at transition state.