ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 2
JKCSEZ 36(2)
April 20, 1992 

Reaction of aniline and iodine in CHCl3, CH2Cl2 : CHCl3(1 : 1), and CH2Cl2 has been studied kinetically by using conductivity method, Pseudo first-order rate constants (k_obs) and second-order rate constants (k_obs/[aniline]) are dependent on the aniline concentration. Second-order rate constants obtained were increased with increasing aniline concentration. We analysed these results on the basis of formation of charge transfer complex as reaction intermediate. From the construction of react ion scheme and derivation of rate equation, we calculated equilibrium constants and activation parameters for the formation and transformation of charge transfer complex. The equilibrium constants were decreased by an increase in the dielectric constant of the solvent and the value is 1.7-3.7M^-1. The rate of transformation are markedly affected by the solvent polarity. ΔH≠ is about 14.2kJ/mol, and ΔS≠ is large negative value of -243J/mol K.