WEO3: π type Molecular orbitalsa for [N]Annulenes illustrating presence (Lk=3) or absence (Lk 2,4,6) of a phase shift.

[N]annulene,
N=
Lk Repository
entry
2b Retrieve
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3 Retrieve
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d
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d
6e Retrieve
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aB3LYP/6-31G(d) wavefunctions, contoured at 0.015 a.u. bClassified as a 2.2.1 knot. cClassified as a 4.2.1 knot. dSignificant mixing with the C-H σ-framework is visible. eClassified as a 6.2.1 knot.