- A Highly Configurationally Stable Heterohelicenium Cation
Christelle Herse, Delphine Bas, Frederik C. Krebs, Thomas Bürgi, Jacques Weber, Tomasz Wesolowski, Bo W. Laursen, Jérôme Lacour
Angew. Chem. Int. Ed. 2003, 42, 3162-3166
[ supporting info ]
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.
open archive unige:3238