Symmetry Lab › Point groups › D2d
D2d point group
A C2 principal axis, 2 perpendicular C2 axes and 2 dihedral mirror planes that bisect them; the principal axis is also an S4 axis.
- Family
- Antiprismatic (Dₙd)
- Order
- 8
- Operations
- E, 2S₄, C₂, 2C₂′, 2σd
- Molecules in the lab
- 6
D2d molecules
| Molecule | Shape | Atoms | 3D model |
|---|---|---|---|
| B₂Cl₄Diboron tetrachloride (gas phase) | Two perpendicular BCl₂ planes | 6 | Open in 3D → |
| C₂H₄ (90° twisted)Ethylene, perpendicular (rotation transition state) | Two perpendicular CH₂ planes | 6 | Open in 3D → |
| C₃H₄Allene (propadiene) | Two perpendicular CH₂ planes | 7 | Open in 3D → |
| S₄N₄Tetrasulfur tetranitride | Cradle: S₄ tetrahedron threaded through an N₄ square | 8 | Open in 3D → |
| C₅H₈Spiropentane | Two perpendicular three-membered rings sharing one carbon | 13 | Open in 3D → |
| C₈H₈Cyclo-octatetraene (tub) | Tub | 16 | Open in 3D → |