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