Thermodynamics of ethyl p-tert-butylcalix[5]arene pentanoate and its cation complexes in nonaqueous media.


The solution behavior of ethyl p-tert-butylcalix[5]arene pentanoate, EtCalix(5), in various protic and aprotic solvents has been assessed from the standard Gibbs energies of transfer of this ligand from acetonitrile to other solvents. These data were derived from solubility measurements of EtCalix(5) in different media. It is concluded that in solvents in… (More)