Linked from

The 24 pages that link to Hückel's rule, each with the reason it gives.

• AromaticityRelated: It gives the familiar electron-count test for many aromatic rings.

• BenzeneRelated: Benzene’s six π electrons satisfy the rule for aromaticity.

• Electrophilic aromatic substitutionRelated: It explains the aromatic stabilization that the reaction temporarily disrupts and then restores.

• Conjugated systemRelated: It applies conjugated orbital overlap to predict aromatic stabilization in cyclic systems.

• Polycyclic aromatic hydrocarbonRelated: It explains aromaticity in individual rings, though fused PAHs can require more detailed analysis.

• Aromatic compoundRelated: It supplies the familiar electron-count test for many aromatic rings.

• PyrroleRelated: Pyrrole has six π electrons, satisfying the rule with n equal to one.

• Woodward–Hoffmann rulesRelated: Its electron-counting logic parallels the symmetry distinctions used for cyclic transition states.

• Electrocyclic reactionRelated: Its electron-count pattern parallels the thermal stereochemical rule for electrocyclic closure.

• FuranRelated: Furan’s ring has six π electrons, the n = 1 case.

• CyclobutadieneRelated: Its electron-count rule predicts why cyclobutadiene’s four π electrons do not confer aromatic stabilization.

• Cyclopentadienyl anionRelated: The anion’s six π electrons meet the rule’s n = 1 condition.

• Aromatic hydrocarbonRelated: It offers a practical electron-count test for many aromatic hydrocarbon rings.

• Cyclic compoundRelated: It distinguishes aromatic cyclic systems from many other conjugated rings.

• ThiopheneRelated: Thiophene has six π electrons, satisfying the rule for aromaticity.

• Aliphatic compoundRelated: The rule helps distinguish aromatic rings from nonaromatic aliphatic rings.

• PyrazineRelated: Pyrazine has six π electrons, matching the rule’s aromatic electron count.

• IsoxazoleRelated: The ring’s six pi electrons satisfy the aromatic electron-count condition.

• PyrazoleRelated: Pyrazole’s six pi electrons satisfy the aromaticity criterion.

• AzuleneRelated: Azulene’s ten π electrons satisfy the rule for aromaticity.

• Forbidden mechanismRelated: It reflects orbital symmetry patterns also used to reason about reaction pathways.