Ruthenium(III) bromide

Identifiers

CAS Number

* 14014-88-1 Y

3D model (JSmol)

* Interactive image
* Interactive image

ChemSpider |

* 75924

EC Number |

* 237-829-4

PubChem CID

* 176290

UNII |

* VJ7MYGN19I Y

InChI

* InChI=1S/3BrH.Ru/h3*1H;/q;;;+3/p-3

Key: WYRXRHOISWEUST-UHFFFAOYSA-K

SMILES

* Br[Ru](Br)Br

* [Br-].[Br-].[Br-].[Ru+3]

Properties

Chemical formula

| RuBr3
Molar mass | 340.782 g/mol
Structure

Crystal structure

| orthorhombic[1]

Space group

| Pmmn, No. 59

Coordination geometry

| octahedral
Hazards
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H314

GHS precautionary statements

| P260, P264, P280, P301+330+331, P303+361+353, P304+340, P305+351+338, P310, P321, P363, P405, P501
Related compounds

Other anions

| Ruthenium(III) chloride

Other cations

| Rhodium(III) bromide
Iron(III) bromide
Molybdenum(III) bromide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Ruthenium(III) bromide is a chemical compound of ruthenium and bromine with the formula RuBr3. It is a dark brown solid that decomposes above 400 °C.[2]

## Preparation

Ruthenium(III) bromide can be prepared by the reaction of ruthenium metal with bromine at high temperature and pressure (720 K and 20 bar):[3]

2 Ru + 3 Br2 → 2 RuBr3

## Structure

The crystal structures of ruthenium(III) bromide contain parallel (RuBr3)∞ columns. The compound undergoes a phase transition around 384 K (111 °C) from an ordered orthorhombic structure in space group Pnmm with alternating long and short Ru-Ru distances to a disordered hexagonal TiI3-like structure in space group P63/mcm with (on average) equal Ru-Ru distances.[1] In the disordered polymorph, the Ru-Ru distances are not believed to actually be equal but appear so due to a random distribution of two distinct column conformations. Both polymorphs consist of hexagonally close-packed bromide ions.[4]

## References

1. ↑ 1.0 1.1 Hillebrecht, H.; Ludwig, T.; Thiele, G. (2004). "About Trihalides with TiI3 Chain Structure: Proof of Pair Forming of Cations in β-RuCl3 and RuBr3 by Temperature Dependent Single Crystal X-ray Analyses". Zeitschrift für Anorganische und Allgemeine Chemie 630 (13–14): 2199–2204. doi:10.1002/zaac.200400106.
2. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1082-1084. ISBN 978-0-08-037941-8.
3. ↑ Housecroft, C. E.; Sharpe, A. G. (2008). Inorganic Chemistry (3rd ed.). Prentice Hall. p. 779. ISBN 978-0-13-175553-6.
4. ↑ Merlino, S.; Labella, L.; Marchetti, F.; Toscani, S. (2004). "Order−Disorder Transformation in RuBr3 and MoBr3: A Two-Dimensional Ising Model". Chem. Mater. 16 (20): 3895–3903. doi:10.1021/cm049235q.

* v
* t
* e

Ruthenium compounds

Ru(0)|

* Ru3(CO)12
* Ru(P(C6H5)3)3(CO)2

Ru(I)|

* (C5(C6H5)4O)2H(Ru(CO)2)2H

Ru(II)|

* RuB2
* Na4Ru(N2C12H6(C6H4SO3)2)3
* (Ru((NC5H4)2)3)Cl2
* Ru(P(C6H5)3)3Cl2
* Ru(SO(CH3)2)4Cl2
* (RuCl2C6H4CH3CH(CH3)2)2
* RuClC5H5(P(C6H5)3)2
* C43H72Cl2P2Ru
* (C5H5)2Ru

Ru(III)|

* RuCl3

Ru(IV)|

* RuO2
* Sr2RuO4

Ru(V)|

* RuF5

Ru(VI)|

* RuF6

Ru(VII)|

* N(C3H7)4RuO4

Ru(VIII)|

* RuO4

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*[CID]: Compound ID
*[H314]: Causes severe skin burns and eye damage
*[P260]: Do not breathe dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P301+330+331]: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
*[P303+361+353]: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P310]: Immediately call a POISON CENTER or doctor/physician
*[P321]: Specific treatment (see … on this label)
*[P363]: Wash contaminated clothing before reuse
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …
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