Abstract
Two crystal structures of cesium tetrabenzo-24-crown-8 complexes are reported. Solvent molecules 4-methylmorpholine (1) and ethylene glycol (2) are observed to coordinate cesium within two clefts created by the cation–crown ether complex. Careful examination of the structures suggests that while both complexes exhibit sterically crowded clefts, the binding of cesium to the crown ether is perturbed only in 2. C—H...π hydrogen bonding is observed between the clefts and the included guests. The ethylene glycol complex 2 forms a complex O—H...O hydrogen bond network between free and bound glycol and nitrate.
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Bryan, J.C., Hay, B.P. Molecular Recognition by Cesium Tetrabenzo-24-Crown-8. Structural Chemistry 12, 283–290 (2001). https://doi.org/10.1023/A:1016628511168
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DOI: https://doi.org/10.1023/A:1016628511168