Iridium(II) chloride Names Other namesIridium 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 aninorganic chemical compound ofiridium metal andchlorine with the chemical formulaIrCl2 .[ 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 standardGibbs 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 . Retrieved31 March 2023 . ^ Kandiner, H. J. (3 September 2013).Iridium Springer-Verlag . p. 55.ISBN 978-3-662-12128-3 . Retrieved31 March 2023 . ^ Cooley, Arnold James (1880).A cyclopædia of practical receipts . Retrieved31 March 2023 . ^ Watts, Henry (1875).A Dictionary of Chemistry and the Allied Branches of Other Sciences . Retrieved31 March 2023 . ^ Friend, John Newton (1922).Cobalt, Nickel, and the Elements of the Platinum Group . Retrieved31 March 2023 . ^ Satya, Prakash (2013).Advanced Chemistry of Rare Elements ISBN 978-81-219-4254-6 . Retrieved31 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
