Common Dihedral Angles for Eclipsed and Staggered Conformations:

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7 Terms

1
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Eclipsed conformations

Higher energy (groups aligned).

2
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θ = 0°

Eclipsed, highest energy): Methyl groups are directly aligned.

3
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θ = 120°

(Eclipsed, high energy): Methyl aligned with hydrogen, less repulsion than at 0°.

4
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θ = 180°

(Anti, lowest energy): Methyl groups are directly opposite each other, most stable.

5
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θ = 60°

(Gauche, local minimum): Methyl groups are staggered but close.

6
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240°

eclipsed

7
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300°