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Shaping calixarene frameworks. Synthesis and structure of a calix[8]arene containing three bridging phosphate units |
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| Authors: | Jrg Gloede Sigrid Ozegowski Dominique Matt Andr De Cian |
| Institution: | aWITEGA-Adlershof, Angewandte Werkstoff-Forschung, Kekuléstr. 4, D-12489 Berlin, Germany bUniversité Louis Pasteur, Laboratoire de Chimie Inorganique Moléculaire, UMR 7513 CNRS, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France cUniversité Louis Pasteur, Service de Cristallographie, 4 rue Blaise Pascal, F-67070 Strasbourg Cedex, France |
| Abstract: | The reaction of p-tert-butylcalix8]arene with PCl5, followed by hydrolysis and subsequent esterification with triethyl orthoformate afforded a triphosphate involving all phenolic oxygen atoms of the calixarene framework. As revealed by an X-ray diffraction study, the presence of two μ3-(O,O,O) and one μ2-(O,O) bridging phosphoryl groups results in an unusual lengthening of the calix8]arene loop (longest O O separation: 13.9 Å) |
| Keywords: | calix[8]arene phosphates X-ray |
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