Abstract
Molecular mechanics calculations performed on calix[4]-arene crown-6 ethers predict that the 1,3-dihydro derivatives will exhibit greater complementarity for potassium and cesium ions than the parent 1,3-bis(alkyloxy) calixcrowns. The X-ray crystal structures of 1,3-alt-bis(octyloxy)calix[4]arene benzocrown-6 ether, dihydrocalix[4]arene benzocrown-6 ether, and the cesium nitrate complex of dihydrocalix[4]-arene benzocrown-6 ether were determined. The structure of the cesium complex corresponds closely to the structure predicted by molecular mechanics. The dihydrocalix[4]arene crown-6 ethers exhibit enhanced cesium selectivity in the extraction of alkali-metal salts.
| Original language | English |
|---|---|
| Pages (from-to) | 4862-4869 |
| Number of pages | 8 |
| Journal | European Journal of Organic Chemistry |
| Issue number | 24 |
| DOIs | |
| State | Published - Dec 15 2003 |
Keywords
- Alkali metals
- Calixarenes
- Liquid-liquid extraction
- Molecular modeling
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