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Molecular structure of butadiene (ball-stick model)

Molecular structure of butadiene (space-filling model)

Lowest MO (in the simple Hückel picture)

HOMO (in the simple Hückel picture)

LUMO (in the simple Hückel picture)

Highest MO (in the simple Hückel picture)

Lowest MO (in the simple Hückel picture)

Lowest MO (in the simple Hückel picture)

Lowest MO (in the simple Hückel picture)

HOMO (in the simple Hückel picture)

HOMO (in the simple Hückel picture)

HOMO (in the simple Hückel picture)

LUMO (in the simple Hückel picture)

LUMO (in the simple Hückel picture)

LUMO (in the simple Hückel picture)

Highest MO (in the simple Hückel picture)

Highest MO (in the simple Hückel picture)

Highest MO (in the simple Hückel picture)