Sodium hexachloroiridate(III) is an inorganic compound with the chemical formula Na
3IrCl
6.
Preparation
Sodium hexachloroiridate(III) can be produced by the reduction of
sodium hexachloroiridate(IV) with
Fe2+,
oxalate
Oxalate (systematic IUPAC name: ethanedioate) is an anion with the chemical formula . This dianion is colorless. It occurs naturally, including in some foods. It forms a variety of salts, for example sodium oxalate (), and several esters such as ...
or
hydrogen sulfide
Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is toxic, corrosive, and flammable. Trace amounts in ambient atmosphere have a characteristic foul odor of rotten eggs. Swedish chemist ...
.
It can also be produced by heating
iridium
Iridium is a chemical element; it has the symbol Ir and atomic number 77. This very hard, brittle, silvery-white transition metal of the platinum group, is considered the second-densest naturally occurring metal (after osmium) with a density ...
metal with
NaCl
Sodium chloride , commonly known as edible salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. It is transparent or translucent, brittle, hygroscopic, and occurs as the mineral hali ...
and
Cl2.
Reactions
Sodium hexachloroiridate(III) will get dehydrated at 110°C, and reversible decomposes at 550°C.
:2 Na
3IrCl
6 ⇌ 2 Ir + 6 NaCl + 3 Cl
2
In air, sodium hexachloroiridate(III) will be oxidized at 450°C.
:2 Na
3IrCl
6 + 2 O
2 → 2 IrO
2 + 6 NaCl + 3 Cl
2
It reacts with
hydrochloric acid
Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungency, pungent smell. It is classified as a acid strength, strong acid. It is ...
to form
hydrogen hexachloroiridate(III).
[Venediktov, A. B.; Kultyshev, R. G. Polynuclear iridium(III) chlorides. ''Zhurnal Neorganicheskoi Khimii'', 1989. 34 (4). 909-915. ]
It also reacts with
ammonia water
Ammonia solution, also known as ammonia water, ammonium hydroxide, ammoniacal liquor, ammonia liquor, aqua ammonia, aqueous ammonia, or (inaccurately) ammonia, is a solution of ammonia in water. It can be denoted by the symbols NH3(aq). Although ...
in sealed tube at 145°C to form
r(NH3)6l
3.
References
{{iridium compounds
Iridium compounds
Sodium compounds
Chloro complexes
Chlorometallates