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Two representatives of a novel class of crownophanes containing fragments of fluorenone and stilbene bridged by units of diethylene glycol and triethylene glycol, respectively, have been synthesized. The crystal structure and complexation behavior of these crownophanes were studied. They form much stronger complexes with dibenzylammonium hexafluorophosphate (logK a value in CH 3 CN...
Two representatives of a novel class of cyclophanes containing two fragments of 2,7-dioxy-9H-fluoren-9-one bridged by triethylene glycol and p-xylyl linking units have been prepared. X-Ray analysis shows that the former has an anti-conformation and the cavity is self-filling with fluorenone moieties.
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