Symmetry Lab › Point groups › D∞h
D∞h point group
A linear molecule with a centre of inversion: the C∞ axis, the planes containing it, a perpendicular mirror plane and an infinite number of perpendicular C2 axes.
- Family
- Linear (C∞v, D∞h)
- Order
- ∞
- Operations
- E, 2C∞, ∞σᵥ, i, 2S∞, ∞C₂
- Molecules in the lab
- 18
D∞h molecules
| Molecule | Shape | Atoms | 3D model |
|---|---|---|---|
| Br₂Dibromine | Linear | 2 | Open in 3D → |
| Cl₂Dichlorine | Linear | 2 | Open in 3D → |
| N₂Dinitrogen | Linear | 2 | Open in 3D → |
| O₂Dioxygen | Linear | 2 | Open in 3D → |
| N₃⁻Azide ion | Linear | 3 | Open in 3D → |
| BeCl₂Beryllium chloride (gas-phase molecule) | Linear | 3 | Open in 3D → |
| CO₂Carbon dioxide | Linear | 3 | Open in 3D → |
| CS₂Carbon disulfide | Linear | 3 | Open in 3D → |
| MgCl₂Magnesium chloride (gas-phase molecule) | Linear | 3 | Open in 3D → |
| HgCl₂Mercury(II) chloride | Linear | 3 | Open in 3D → |
| I₃⁻Triiodide ion | Linear | 3 | Open in 3D → |
| XeF₂Xenon difluoride | Linear | 3 | Open in 3D → |
| C₂H₂Acetylene (ethyne) | Linear | 4 | Open in 3D → |
| NCCNCyanogen | Linear | 4 | Open in 3D → |
| ClC≡CClDichloroacetylene | Linear | 4 | Open in 3D → |
| Hg₂Cl₂Mercury(I) chloride (calomel) | Linear | 4 | Open in 3D → |
| C₃O₂Carbon suboxide | Linear | 5 | Open in 3D → |
| [Au(CN)₂]⁻Dicyanoaurate(I) ion | Linear | 5 | Open in 3D → |