No abstract

A conductance study of the interaction between CO2`, Ni2`, Cu2`, Zn2`, Cd2`, Pb2`and Hg2`ions with hexathia-18-crown-6-tetraone in dimethyl sulfoxide solution has been carried out at various temperatures. Formation constants of the resulting 1 : 1 complexes were determined from the molar conductanceÈmole ratio data and found to vary in the order Hg2` [ Pb2`[ Cd2`[ Cu2`[ Ni2`[ Co2`[ Zn2`. The enthalpy and entropy of complexation were determined from the temperature dependence of the formation constants. All complexes formed were enthalpy stabilized but entropy destabilized.