Symmetry Lab › D∞h › Dicyanoaurate(I) ion
[Au(CN)₂]⁻ Dicyanoaurate(I) ion
Linear · point group D∞h · order ∞
- Point group
- D∞h — 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.
- Order
- ∞
- Operations
- E, 2C∞, ∞σᵥ, i, 2S∞, ∞C₂
- Shape
- Linear
- Atoms
- 5 (N × 2, C × 2, Au)
Symmetry elements of [Au(CN)₂]⁻
- C∞ — the molecular axis: any rotation leaves the molecule unchanged
- σᵥ (one of ∞) — any plane containing the axis
- σᵥ (another) — any plane containing the axis
- i — centre of inversion
- σh — perpendicular to the axis, through the centre
- C₂ (one of ∞) — any line through the centre perpendicular to the axis
- C₂ (another) — same, at right angles
- S∞ — any rotation about the axis, then reflect in σh
Structure
- Au–C 1.98 Å, C≡N 1.15 Å
- Linear d¹⁰ gold(I)
- The ion in gold cyanidation
![Dicyanoaurate(I) ion ([Au(CN)2]-) — D∞h symmetry elements](/molecular-symmetry/infographics/AuCN2-_DicyanoaurateIion_Dinfh.png)