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32.5.30: Chapter 30

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    460341
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    Problem 30-1 Ethylene: ψ1 is the HOMO and ψ2* is the LUMO in the ground state; ψ2* is the HOMO and there is no LUMO in the excited state. 1,3-Butadiene: ψ2 is the HOMO and ψ3* is the LUMO in the ground state; ψ3* is the HOMO and ψ4* is the LUMO in the excited state.
    Problem 30-2 Disrotatory: cis-5,6-dimethyl-1,3-cyclohexadiene;
    conrotatory: trans-5,6-dimethyl-1,3-cyclohexadiene. Disrotatory closure occurs.
    Problem 30-3 The more stable of two allowed products is formed.
    Problem 30-4 trans-5,6-Dimethyl-1,3-cyclohexadiene; cis-5,6-dimethyl-1,3-cyclohexadiene
    Problem 30-5 cis-3,6-Dimethylcyclohexene; trans-3,6-dimethylcyclohexene
    Problem 30-6 A [6 + 4] suprafacial cycloaddition
    Problem 30-7 An antarafacial [1,7] sigmatropic rearrangement
    Problem 30-8 Trans-hepta-1,5-diene undergoes 3,3 shift to produce 3-methylhexa-1,5-diene.
    Problem 30-9 A series of [1,5] hydrogen shifts occur.
    Problem 30-10 o-(1-Methylallyl)phenol
    Problem 30-11 Claisen rearrangement is followed by a Cope rearrangement.
    Problem 30-12
    (a) Conrotatory
    (b) Disrotatory
    (c) Suprafacial
    (d) Antarafacial
    (e) Suprafacial

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