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- Title
THERMODYNAMIC STUDY OF THE BINDING OF 18-CROWN-6, BENZO-18-CROWN-6 AND DIBENZO-18-CROWN-6 WITH Pb<sup>2+</sup> IONS IN SOME APROTIC SOLVENTS.
- Authors
Wagner-Czauderna, Elzbieta; Kalinowski, Marek K.
- Abstract
A cyclic voltammetric study of the interaction of Pb2+ ions with 18-crown-6 (18C6), benzo-18-crown-6 (B18C6) and dibenzo-18-crown-6 (DB18C6) has been carried out in acetonitrile, propylene carbonate, propionitrile, iV.iV-dimethylform amide and dimethyl sulfoxide solutions. In each solvent, stability constants of the resulting 1.1 complexes were found to vary in the order 18C6>B18C6>DB18C6. There are inverse relationships between the complex stability and the Gutmann donor number of solvents. The enthalpy and entropy of complexation were determined from the temperature dependence of the stability constants; all complexes formed were enthalpy stabilized but entropy destabilized.
- Publication
Main Group Metal Chemistry, 2001, Vol 24, Issue 10, p669
- ISSN
0792-1241
- Publication type
Article