Calixarenes as Polyhapto-aromatic Ligands: Alkali Metal Ions and Sulfonated Calixarenes |
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| Authors: | Zouhair Asfari Jack Harrowfield Pierre Thuéry Jacques Vicens |
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| Affiliation: | 1. ECPM , Université Louis Pasteur de Strasbourg , 25, rue Becquerel, Cronenbourg, Strasbourg Cedex 2, F-67087, France;2. School of Biomedical and Chemical Sciences , University of Western Australia , 35 Stirling Highway, Crawley, WA, 6009, Australia;3. CEA/Saclay , DSM/DRECAM/SCM , (CNRS URA 331), Bat. 125, Gif-sur-Yvette, 91191, France |
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| Abstract: | Crystal structure determinations for the hexarubidium and octacesium derivatives of calix[6]arene hexasulfonic acid, as well as of a new solvate of the pentasodium derivative of calix[4]arene tetrasulfonic acid, and comparison with structural data from the literature for alkali metal complexes of sulfonated calixarenes, have provided further evidence for the importance of interactions with aromatic ~ -electrons for the heavier alkali metal cations. There is evidence as well that this interaction can be enhanced by extended ionization of the sulfonated calixarene. |
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| Keywords: | Calixarene Sulfonates Alkali Metals π-Donation Crystal Structures |
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