Newman projection
down C1–C2
—
Torsional energy
kJ/mol vs dihedral angle φ · drag on the curve
Dihedral φ
60°
Energy
0 kJ/mol
Klyne–Prelog
—
Molecule
Ethane
Propane
Butane (C2–C3)
Dihedral angle φ
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60°
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Population at 25 °C