Martin-Santamaria, Lavan and Rzepa: 2000

[16] Annulene: Möbius isomer

NICS: -1 ppm

characteristic HOMO

Castro, Isborn, Karney, Mauksch, von Schleyer: 2002

NICS: [12] -14.5, [16] -14.6, [20] -10.2