Resonance Energy of Benzene

Benzene’s special stability is due to the delocalized π molecular orbital formation. The magnitude of this extra stability can be estimated by measuring the changes in the heat of hydrogenations associated with reactions. Hydrogenation of cyclohexane evolves 28.6 kcal/mol, a value typical for hydrogenation of alkenes. Fig makes these energy relationships more evident. The 36kcal … Read more

Molecular Orbital Structure of Benzene

Introduction The structure of benzene is best described in the modern molecular orbital theory. All six carbon atoms in benzene are sp2 hybridized. The sp2 hybrid orbitals overlap with each other and with the s orbitals of the six hydrogen atoms forming C-C and C-H σ bonds. Formation of σ- bonds in benzene Since the … Read more

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