Structural aspects of cesium ion selectivity by tetrabenzo-24-crown-8

Citation
Jc. Bryan et al., Structural aspects of cesium ion selectivity by tetrabenzo-24-crown-8, INORG CHIM, 290(1), 1999, pp. 86-94
Citations number
39
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
INORGANICA CHIMICA ACTA
ISSN journal
00201693 → ACNP
Volume
290
Issue
1
Year of publication
1999
Pages
86 - 94
Database
ISI
SICI code
0020-1693(19990630)290:1<86:SAOCIS>2.0.ZU;2-0
Abstract
The structural origins of the selectivity of the cesium ion over other alka li metal ions by tetrabenzo-24-crown-8 are investigated using molecular mec hanics and single crystal X-ray diffraction. The structures containing Csand Rb+ are the first reported for these ions with any 24-crown-8 ether. Th e same crown conformation is observed for Cs+, Rb+ and acetonitrile as gues ts, suggesting that this binding conformation is relatively low energy and inflexible. A different, higher energy, crown conformation is observed in t he Na+ structure. (C) 1999 Published by Elsevier Science S.A. All rights re served.