| Tabular Pericyclic Reaction Selection Rules | ||||
|---|---|---|---|---|
| Condition | + Electron count | + Stereochemistry ⇒ | Topology | ≡ Lk |
| 1: Heat (Δ) | 4n+2 | Suprafacial‡ | Hückel | 0† |
| 2: Light (hν) | 4n | Suprafacial‡ | Hückel | 0† |
| 3: Heat (Δ) | 4n | Odd antarafacial | Möbius | Odd |
| 4: Light (hν) | 4n+2 | Odd antarafacial | Möbius | Odd |
| Diagrammatic Pericyclic Reaction Selection Rules | ||||
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| Frost, Musulin and Zimmermann diagram (1965) | ||||
© Henry S. Rzepa, 1978-2014. Hide|show Toolbar.