ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 21, Number 1
JKCSEZ 21(1)
February 20, 1977 

The rate constant of the reaction of 3-or 4-substituted pyridines with benzyl benzenesulfonate in acetone at 35℃ were determined by an electric conductivity method. According to the Hammett plot, the rates were increased the electron donating ability at the SN2 reaction of benzyl benzenesulfonate with pyridine and 4-NH2 pyridine was correlated with σ+ than Hammett σ value. This result was explained that NH2 group and N atom in pyridine are largely contribute by resonance. In Bronsted plot, 4-amino and electron attracting group were deviated from the increasing part at linearity. It was considered to solvent effects on substituents. A mechanistic possibility was proposed to account for the results. Some activation parameters were also calculated.