The SCF-MO solution for C9F9+

Orbital 65
Phase 1 Phase 2
Orbital 67
Phase 1 Phase 2

Note: The phase thresholds are not at identical levels, to enable clarity. Both phases encircle the other in orbital 65, but only the violet phase encircles the yellow phase in orbital 67, not vice versa. This is therefore not a proper Möbius MO.