## Wikipedia - メビウス芳香族性 (ja) Möbius aromaticity

https://doi.org/10.1351/goldbook.M03957
A monocyclic array of orbitals in which there is a single out-of-phase overlap (or, more generally, an odd number of out-of-phase overlaps) reveals the opposite pattern of @[email protected] character to Hückel systems; with $$4\, n$$ electrons it is stabilized (aromatic), whereas with $$4\, n+2$$ it is destabilized (antiaromatic). In the @[email protected] $$4\, n+2$$ Möbius π-electron systems are stabilized, and $$4\, n$$ systems are destabilized. No examples of ground-state Möbius π-electron systems are known, but the concept has been applied to @[email protected] of @[email protected] The name is derived from the topological analogy of such an arrangement of orbitals to a Möbius strip.
See:
aromatic