BRAINCAKEEvidence for Delocalisation - Enthalpy of Hydrogenation
Enthalpy changes of hydrogenation give strong numerical evidence that benzene is more stable than the Kekulé structure.
Cyclohexene has one C=C bond. Hydrogenating it to cyclohexane releases 120 kJ per mole:
C6H10 + H2 → C6H12 ΔH = −120 kJ mol−1
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More in Aromatic Chemistry
- Benzene
- The Kekulé Model
- The Delocalised Model of Benzene
- Naming Aromatic Compounds
- Electrophilic Substitution
- Nitration of Benzene
- Mechanism of Nitration
- Uses of Nitration
All 11 lessons in Aromatic Chemistry · All AQA A-level Chemistry topics