Iridium(III) chloride

Iridium(III) chloride

α-IrCl3

β-IrCl3
Iridium(III) chloride hydrate
Iridium(III) chloride trihydrate
Names
Other names
Iridium trichloride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.028 Edit this at Wikidata
EC Number
  • 233-044-6
UNII
  • InChI=1S/3ClH.Ir/h3*1H;/q;;;+3/p-3
    Key: DANYXEHCMQHDNX-UHFFFAOYSA-K
  • [Cl-].[Cl-].[Cl-].[Ir+3]
Properties
IrCl3
Molar mass 298.58 g/mol (anhydrous)

316.60 g/mol (hydrate)

Appearance brown solid (α-anhydrous)
red solid (β-anhydrous)
dark green solid (trihydrate)
Density 5.30 g/cm3, solid[1]
Melting point 763 °C (1,405 °F; 1,036 K)[1][2] (decomposes)
insoluble (anhydrous IrCl3), soluble (hydrated derivative)[1]
Solubility Insoluble in HCl and alkanes[1]
−14.4·10−6 cm3/mol
Structure
Monoclinic, mS16
C12/m1, No. 12
Thermochemistry
-257 kJ/mol
Hazards
GHS labelling:[3]
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H302, H411
Flash point non-flammable
Related compounds
Other cations
Rhodium(III) chloride
Related compounds
Platinum(II) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Iridium(III) chloride is the inorganic compound with the formula IrCl3. The anhydrous compound is relatively rare, but the related hydrate is much more commonly encountered. The anhydrous salt has two polymorphs, α and β, which are brown and red colored respectively. More commonly encountered is the hygroscopic dark green trihydrate IrCl3(H2O)3 which is a common starting point for iridium chemistry.[4]

  1. ^ a b c d Haynes, William, ed. (2014). CRC Handbook of Chemistry and Physics. CRC Press. p. 4-68. ISBN 9781482208689.
  2. ^ Cite error: The named reference therm was invoked but never defined (see the help page).
  3. ^ "C&L Inventory". echa.europa.eu. Retrieved 23 December 2021.
  4. ^ Cite error: The named reference housecroft was invoked but never defined (see the help page).