Charged Möbius Annulenes

The charged annulene C9H9+ has NICS: -13.4 ppm
HOMO shows a characteristic rotaxane-like nature.

M. Mauksch, V. Gogonea, H. Jiao and P. v. R. Schleyer Angew. Chemie Int. Edition, 1998, 37, 2395.

© H. S. Rzepa, 2002.