Platinum(IV) iodide is a
inorganic compound
In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemi ...
with the formula . A dark brown diamagnetic solid, it is one of several binary iodides of platinum.
Synthesis
The effect of iodine on platinum:
:
Also, decomposition of hydrogen hexaiodoplatinate(IV) at 80 °C:
:
Physical properties
Platinum(IV) iodide forms dark brown crystals of several modifications:
''α''-,
rhombic crystal system, spatial group ''P bca'', cell parameters a = 1.290 nm, b = 1.564 nm, c = 0.690 nm, Z = 8;
''β''-,
cubic crystal system, spatial group ''P m3m'', cell parameters a = 0.56 nm, Z = 1;
''γ''-,
tetragonal crystal system
In crystallography, the tetragonal crystal system is one of the 7 crystal systems. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a squ ...
, spatial group ''I 41/a'', cell parameters a = 0.677 nm, c = 3.110 nm, Z = 8.
decomposes in water. Soluble in
alcohol
Alcohol most commonly refers to:
* Alcohol (chemistry), an organic compound in which a hydroxyl group is bound to a carbon atom
* Alcohol (drug), an intoxicant found in alcoholic drinks
Alcohol may also refer to:
Chemicals
* Ethanol, one of sev ...
,
acetone
Acetone (2-propanone or dimethyl ketone), is an organic compound with the formula . It is the simplest and smallest ketone (). It is a colorless, highly volatile and flammable liquid with a characteristic pungent odour.
Acetone is miscible wi ...
,
alkali
In chemistry, an alkali (; from ar, القلوي, al-qaly, lit=ashes of the saltwort) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of ...
, HI, KI, liquid
.
Chemical properties
Decomposes when heated:
:
When dissolved in
hydroiodic acid
Hydroiodic acid (or hydriodic acid) is an aqueous solution of hydrogen iodide (HI). It is a strong acid, one that is ionized completely in an aqueous solution. It is colorless. Concentrated solutions are usually 48% to 57% HI.
Reactions
Hyd ...
, forms hydrogen hexaiodoplatinate(IV):
:
References
{{Iodides
Platinum compounds
Iodine compounds
Iodides