Contribution No. 255 from the Elastomer Chemicals Department, E. I. du Pont de Nemours and Company, Inc.
Macrocyclic Polyethers and Their Complexes†
Article first published online: 22 DEC 2003
Copyright © 1972 by Verlag Chemie, GmbH, Germany
Angewandte Chemie International Edition in English
Volume 11, Issue 1, pages 16–25, January 1972
How to Cite
Pedersen, C. J. and Frensdorff, H. K. (1972), Macrocyclic Polyethers and Their Complexes. Angew. Chem. Int. Ed. Engl., 11: 16–25. doi: 10.1002/anie.197200161
- Issue published online: 22 DEC 2003
- Article first published online: 22 DEC 2003
- Manuscript Received: 22 FEB 1971
- Crown compounds;
The most important, and almost unique, property of the macrocyclic polyethers (“crown compounds”) is their tendency to form complexes with alkali metal salts and salts with similar cations. Such complexes are held together by electrostatic attraction between the cation and the negative end of the CO dipoles. The stability of the polyether complexes depends primarily upon how well the cation fits into the polyether ring; other factors are the charge density of the cation and—in solution—the solvating power of the medium. Cyclic polyethers have been successfully employed, inter alia, in experiments with ionic compounds in organic solvents and in studies of ion transport in biological systems.