Sodium hexachloroiridate(III)

Sodium hexachloroiridate(III) is an inorganic compound with the chemical formula Na3IrCl6.

Sodium hexachloroiridate(III)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.036.162
EC Number
  • 239-795-6
  • InChI=1S/6ClH.Ir.3Na/h6*1H;;;;/q;;;;;;+3;3*+1/p-6
    Key: GSONQQIOULBMRS-UHFFFAOYSA-H
  • [Na+].[Na+].[Na+].Cl[Ir-3](Cl)(Cl)(Cl)(Cl)Cl
Properties
Cl6IrNa3
Molar mass 473.89 g·mol−1
31.46 g/100 g (15°C)[1]
Solubility insoluble in ethanol, very slightly soluble in acetone[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

Sodium hexachloroiridate(III) can be produced by the reduction of sodium hexachloroiridate(IV) with Fe2+, oxalate or hydrogen sulfide.[2]

It can also produced by heating iridium metal with NaCl and Cl2.[3]

Reactions

Sodium hexachloroiridate(III) will get dehydrated at 110°C, and reversible decomposes at 550°C.[1]

2 Na3IrCl6 ⇌ 2 Ir + 6 NaCl + 3 Cl2

In air, sodium hexachloroiridate(III) will be oxidized at 450°C.[1]

2 Na3IrCl6 + 2 O2 → 2 IrO2 + 6 NaCl + 3 Cl2

It reacts with hydrochloric acid to form hydrogen hexachloroiridate(III).[4]

It also reacts with ammonia water in sealed tube at 145°C to form [Ir(NH3)6]Cl3.[3]

References
  1. Pannetier, G.; Macarovici, D.; Gaultier, M. (1972). "Les complexes halogenes d'iridium". Journal of Thermal Analysis (in French). Springer Science and Business Media LLC. 4 (2): 177–186. doi:10.1007/bf01911927. ISSN 0368-4466. S2CID 102384528.
  2. Fergusson, JE; Rankin, DA (1983). "The chloro and bromo complexes of iridium(III) and iridium(IV). I. Preparation". Australian Journal of Chemistry. CSIRO Publishing. 36 (5): 863. doi:10.1071/ch9830863. ISSN 0004-9425.
  3. Housecroft, Catherine E. (2006-03-15), "Iridium: Inorganic & Coordination Chemistry", Encyclopedia of Inorganic Chemistry, Chichester, UK: John Wiley & Sons, Ltd, doi:10.1002/0470862106.ia101, ISBN 0470860782
  4. Venediktov, A. B.; Kultyshev, R. G. Polynuclear iridium(III) chlorides. Zhurnal Neorganicheskoi Khimii, 1989. 34 (4). 909-915. ISSN 0044-457X


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