Iridium(II) chloride
Names
Other names
Iridium dichloride, iridium bichloride
Identifiers
InChI=1S/2ClH.Ir/h2*1H;/q;;+2/p-2
Key: BBVIQHLJRNEBBW-UHFFFAOYSA-L
Properties
Cl 2 Ir
Molar mass
−1
Appearance
dark-green crystals
Melting point
773 °C (1,423 °F; 1,046 K)
Practically insoluble
Related compounds
Related compounds
Osmium(II) chloride
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Iridium(II) chloride is an inorganic chemical compound of iridium metal and chlorine with the chemical formula IrCl2 .[1] [2] hydrochloric acid .
The substance is obtained by the interaction of powdered metallic iridium with chlorine gas when heated:[3] [4] Ir + Cl2 → IrCl2 2IrCl3 + Ir → 3IrCl2 Physical properties [ edit ] Iridium dichloride forms shiny dark-green crystals that are practically insoluble in water.[5] IrCl2 decomposes without melting.
The standard Gibbs energy of the formation of ΔG (298 K, kJ/mol) is -139.7.
Chemical properties [ edit ] When heated to 773 °C decomposes according to the equation:[6]
2IrCl2 → 2IrCl + Cl2 At temperatures above 798 °C, complete decomposition of the substance occurs:
IrCl2 → Ir + Cl2
^ Regnault, Victor (1853). Elements of Chemistry: For the Use of Colleges, Academies, and Schools . Retrieved 31 March 2023 . ^ Kandiner, H. J. (3 September 2013). Iridium Springer-Verlag . p. 55. ISBN 978-3-662-12128-3 . Retrieved 31 March 2023 . ^ Cooley, Arnold James (1880). A cyclopædia of practical receipts . Retrieved 31 March 2023 . ^ Watts, Henry (1875). A Dictionary of Chemistry and the Allied Branches of Other Sciences . Retrieved 31 March 2023 . ^ Friend, John Newton (1922). Cobalt, Nickel, and the Elements of the Platinum Group . Retrieved 31 March 2023 . ^ Satya, Prakash (2013). Advanced Chemistry of Rare Elements ISBN 978-81-219-4254-6 . Retrieved 31 March 2023 .
Iridium(0) Iridium(I)
Iridium(II) Iridium(III)
Iridium(IV) Iridium(V) Iridium(VI) Iridium(VII) Iridium(VIII/IX)
Salts and covalent derivatives of the
chloride ion