二、 Stabil i ty of Unsaturated Hydrocarbons Structure and Stability of Benzene 1. All the carbon are sp hybridized(ring plane 2. The p orbital on each carbon can overlap with two adjacent p orbitals 3. Particularly stable (a)
二、Stability of Unsaturated Hydrocarbons Structure and Stability of Benzene 1. All the carbon are sp2 hybridized (ring plane) 2. The p orbital on each carbon can overlap with two adjacent p orbitals. 3. Particularly stable
二、 Stabil i ty of Unsaturated Hydrocarbons Structure and Stability of Benzene L.且后 An unusually large resonance energy(151 kJ/mole) △H°=-286 kcal/mol(-120kmol) experimental cyclohexene +3H2— △H°=-858 kcal/mo(-359kJ/mo calculated "cyclohexatriene" hypothetical 3H2 AH-49. 8 kacl/mol(208 kJ/mol benzene experimental
二、Stability of Unsaturated Hydrocarbons Structure and Stability of Benzene An unusually large resonance energy (151kJ/mole) 3 H2 H0 - 49.8 kacl/mol (208 kJ/mol) benzene experimental