Cone, partial cone, 1,2-alternate, and 1,4-alternate conformers of tetrakis[(ethoxycarbonyl)-methoxy] [220.127.116.11]metacyclophane (MCP, 2) were isolated and characterized by1H-NMR and an X-ray crystal structure analysis of the 1,4-alternate conformer. Of the four conformers, only the cone conformer 2d forms a complex with alkali metals. The stability constants of 2d with alkali metal ions were determined by the direct1H-NMR method and UV spectra, and the order observed as potassium ≪cesium, sodium ions.
|Number of pages||13|
|Journal||Journal of Inclusion Phenomena and Molecular Recognition in Chemistry|
|Publication status||Published - Mar 1994|
- conformational isomers
ASJC Scopus subject areas
- Food Science
- Condensed Matter Physics