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Christelle Herse, Delphine Bas, Frederik C. Krebs, Thomas Bürgi, Jacques Weber, Tomasz Wesolowski, Bo W. Laursen and Jérôme Lacour A Highly Configurationally Stable [4]Heterohelicenium Cation Angewandte Chemie International Edition 42

Version of Record online: 10 JUL 2003 | DOI: 10.1002/anie.200351443

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A [4](hetero)helicenium cation was resolved using the hexacoordinated phosphorus-containing binphat anion (see picture: N, blue; O, red; C, gray). Its absolute configuration was determined by vibrational circular dichroism spectroscopy. The barrier of interconversion of its enantiomers is higher than that of [6]helicene.

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