RESUMO
Complex formation constants, K, were calculated for some alkenes from the retention data on ethoxylated eugenol [EE] stationary phase containing different concentrations of silver nitrate by GC. Thermodynamic quantities, i.e., differential molar free energy [delta Gs], enthalpy [delta Hs], entropy [delta Ss] and specific free energy of interaction [delta Gsp] were calculated. The relationships between the thermodynamic quantities and the corrected retention volumes were plotted and discussed. The obtained results reveal that, in EE solvent, the interaction between Ag + ions and alkene is stronger than Ag + ions and the corresponding alkane permitting the calculation of K values. The calculated values of thermodynamic quantities of interaction between alkenes and EE-AgNO 3 stationary phase are lower than the corresponding values on EE alone