QuestionOrganic / π molecular orbitals
Which one of the following represents the high-energy Highest Occupied Molecular Orbital (HOMO) of 1,3-butadiene ?
- (a) All four p orbitals in phase (no node)
- (b) C1, C2 in one phase and C3, C4 in the opposite phase (one node at the centre)
- (c) Phases alternate at every carbon (three nodes)
- (d) C2, C3 in one phase and C1, C4 in the opposite phase (two nodes)
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