Ruthenium(III) iodide

Ruthenium(III) iodide  Names

Other names

Ruthenium triiodide

Identifiers

CAS Number

* 715652-38-3 Y

3D model (JSmol)

* Interactive image
* Interactive image

InChI

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

Key: LJZVDOUZSMHXJH-UHFFFAOYSA-K

SMILES

* I[Ru](I)I

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

Properties

Chemical formula

| RuI3
Density | 5.25 g cm−3

Solubility in water

| sparingly soluble[1]
Structure

Crystal structure

| hexagonal[1]
Thermochemistry

Std molar
entropy (S ~~o~~ 298)

| −247 J mol−1 K−1[1]

Std enthalpy of
formation (ΔfH⦵298)

| −159 kJ mol−1[1]
Related compounds

Other anions

| Ruthenium(III) fluoride
Ruthenium(III) chloride
Ruthenium(III) bromide

Other cations

| Iron(III) iodide
Osmium(III) iodide
Technetium(III) iodide
Rhodium(III) iodide

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

Infobox references

Ruthenium(III) iodide is a chemical compound containing ruthenium and iodine with the formula RuI
3. It is a black solid.[2]

## Preparation

Ruthenium(III) iodide can be prepared in several ways.[1][3]

The reaction of ruthenium tetroxide with aqueous hydroiodic acid:[4]

RuO
4 \+ excess HI → RuI

The thermal decomposition of pentaammineruthenium(III) iodide:[3]

Ru(NH

3 → RuI
3 \+ 5 NH

The salt metathesis reaction of hydrated ruthenium(III) chloride with potassium iodide in aqueous solution:[1]

RuCl
3 * xH
2O + 3 KI → RuI
3 \+ 3 KCl + xH

Direct combination of the elements has been reported to succeed under some conditions (350 °C) but not others (500 °C and 20 atm):[1]

2 Ru + 3 I
2 → 2 RuI

## Structure

Ruthenium(III) iodide adopts an extended structure with octahedral coordination geometry at ruthenium.[4] There is some doubt about the characterisation of ruthenium(III) iodide and it may be an oxohalide or a hydroxyhalide.[1]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Seddon, Elaine A.; Seddon, Kenneth R. (1984). The Chemistry of Ruthenium. Elsevier. p. 161. ISBN 0-444-42375-3.
2. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1083. ISBN 978-0-08-037941-8.
3. ↑ 3.0 3.1 Cotton, Simon A. (1997). Chemistry of Precious Metals. Springer Netherlands. p. 3. ISBN 9780751404135.
4. ↑ 4.0 4.1 Housecroft, C. E.; Sharpe, A. G. (2008). Inorganic Chemistry (3rd ed.). Prentice Hall. p. 779. ISBN 978-0-13-175553-6.

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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

HI |  |  |  | He

|
|
|
|

LiI | BeI2 | BI3 | CI4 | NI3 | I2O4,
I2O5,
I4O9 | IF,
IF3,
IF5,
IF7 | Ne
NaI | MgI2 | AlI3 | SiI4 | PI3,
P2I4 | S  | ICl,
ICl3 | Ar
KI | CaI2 | Sc  | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2,
GeI4 | AsI3 | Se  | IBr | Kr
RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo  | Tc  | Ru  | Rh  | Pd  | AgI | CdI2 | InI3 | SnI4,
SnI2 | SbI3 | TeI4 | I  | Xe
CsI | BaI2 |  | HfI4 | TaI5 | W  | Re  | Os  | Ir  | Pt  | AuI | Hg2I2,
HgI2 | TlI | PbI2 | BiI3 | Po  | AtI | Rn
Fr  | RaI2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
La  | Ce  | Pr  | Nd  | Pm  | SmI2 | Eu  | Gd  | TbI3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac  | ThI4 | Pa  | UI3,
UI4 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | EsI3 | Fm  | Md  | No  | Lr

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