Symmetry Lab › D4h › trans-Dichlorotetracarbonylosmium(II)
trans-[OsCl₂(CO)₄] trans-Dichlorotetracarbonylosmium(II)
Octahedral, two Cl trans · point group D4h · order 16
- Point group
- D4h — A C4 principal axis, 4 perpendicular C2 axes and a horizontal mirror plane; these also give 4 vertical planes and a centre of inversion.
- Order
- 16
- Operations
- E, 2C₄, C₂, 2C₂′, 2C₂″, i, 2S₄, σh, 2σᵥ, 2σd
- Shape
- Octahedral, two Cl trans
- Atoms
- 11 (Os, Cl × 2, C × 4, O × 4)
Symmetry elements of trans-[OsCl₂(CO)₄]
- C₄ — along Cl–Os–Cl
- C₂′ (x) — along one OC–Os–CO line
- C₂′ (y) — along the other
- C₂″ (1) — in the Os(CO)₄ plane, between CO groups
- C₂″ (2) — in the Os(CO)₄ plane, between CO groups
- i — centre of inversion
- σh — the Os(CO)₄ plane
- σᵥ (xz) — contains Cl–Os–Cl and two CO
- σᵥ (yz) — contains Cl–Os–Cl and the other two CO
- σd (1) — contains Cl–Os–Cl, between CO groups
- σd (2) — contains Cl–Os–Cl, between CO groups
- S₄ — rotate 90°, then reflect
Structure
- Os–Cl 2.40 Å, Os–C 1.95 Å
- Cl–Os–Cl 180°
- Four CO in one plane
![trans-Dichlorotetracarbonylosmium(II) (trans-[OsCl2(CO)4]) — D4h symmetry elements](/molecular-symmetry/infographics/trans-OsCl2CO4_transDichlorotetracarbonylosmiumII_D4h.png)
Other D4h molecules
[Pt(NH₃)₄]²⁺ (N atoms shown)Tetraammineplatinum(II) ion[AuCl₄]⁻Tetrachloroaurate(III) ion[ICl₄]⁻Tetrachloroiodate(III) ion[PdCl₄]²⁻Tetrachloropalladate(II) ion[PtCl₄]²⁻Tetrachloroplatinate(II) ion[BrF₄]⁻Tetrafluorobromate(III) ionXeF₄Xenon tetrafluoridetrans-[CoCl₂(NH₃)₄]⁺trans-Tetraamminedichlorocobalt(III) (N atoms shown)C₄H₄²⁻Cyclobutadiene dianion (planar)[Ni(CN)₄]²⁻Tetracyanonickelate(II) ion[Pt(CN)₄]²⁻Tetracyanoplatinate(II) ion[Re₂Cl₈]²⁻Octachlorodirhenate(III) ion