Complex formation between 15-crown-5 and malononitrile was studied in
twelve solvents by calorimetry. Thermodynamic parameters for the crown
ether adduct were determined and used in a LFER analysis to ascertain
the solvent effects on the complexation process. Enthalpy of solution
data show that malononitrile is solvated by electron pair donation by
the solvents and the crown ether is solvated by donating electron pai
rs to the solvents. The complex is more solvated than the monomers.