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Dihedral Angle

Last updated

Feb 28, 2022
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- Dienophile
- Dihydroxylation

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A dihedral angle or torsional angle (symbol: θ) is the angle between two bonds originating from different atoms in a Newman projection.

eg: staggered conformation of ethane

The angle between any blue C-H bond (C-H₁, C-H₂, C-H₃) and any red C-H bond (C-H₄, C-H₅, C-H₆) is a dihedral angle. Thus, the angle between C-H₁ and C-H₄, which is 60º, is a dihedral angle.

Geometrically, a dihedral angle is an angle between two intersecting planes. For example, the dihedral angle between C-H₁ and C-H₄ in the above Newman projection is the angle between the plane bisecting C-H₁ and that bisecting C-H₄, both perpendicular to the plane of the screen.

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