| Autor: |
Felicia Maharaj, Donald Craig, Marcia Scudder, Roger Bishop, Naresh Kumar |
| Zdroj: |
Journal of Inclusion Phenomena & Macrocyclic Chemistry; Oct2007, Vol. 59 Issue 1/2, p17-24, 8p |
| Abstrakt: |
Abstract  New tetrabromo calix[4]arene derivatives 2 and 5a/5b have been synthesised and found to function as inclusion hosts for nitrile guests. The X-ray structures of (2)2 � (pivalonitrile)3 and (5a) � (acetonitrile)3 � (water) show that, in each compound, molecular inclusion occurs by a combination of complexation within the calixarene bowl and lattice inclusion outside the bowl. Racemic 5a/5b crystallises as a conglomerate, with chiral discrimination between these enantiomers being assisted by the propeller-shaped molecular conformation they adopt in the solid state. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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