Platinum(IV) iodide

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Platinum(IV) iodide
PtI4.png
Names
IUPAC name
tetraiodoplatinum
Other names
Platinum tetraiodide, platinic iodide, platinum(4+) tetraiodide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.029.280 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 232-207-9
PubChem CID
UNII
  • InChI=1S/4HI.Pt/h4*1H;/q;;;;+4/p-4
    Key: RNJPWBVOCUGBGY-UHFFFAOYSA-J
  • I[Pt](I)(I)I
Properties
I4Pt
Molar mass 702.702 g·mol−1
Appearancebrown crystals
Density 6.06 g/cm3
Melting point 130 °C (266 °F; 403 K)
decomposes in water
Related compounds
Related compounds
 Iridium tetraiodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Platinum(IV) iodide is a inorganic compound with the formula PtI4. [1] it is a dark brown diamagnetic solid and is one of several binary iodides of platinum.

Contents

Preparation

Platinum(IV) iodide can be prepared from the effect of iodine on platinum: [2]

Pt + 2I2 → PtI4

It can also be obtained from the decomposition of hydrogen hexaiodoplatinate(IV) at 80 °C:

H2[PtI6] → PtI4 + 2HI

Physical properties

Platinum(IV) iodide forms dark brown crystals of several modifications: [3]

Platinum(IV) iodide decomposes in water. It is also soluble in ethanol, acetone, alkali, HI, KI, liquid NH3. [5]

Chemical properties

It decomposes when heated:

PtI4 → Pt + 2I2

When dissolved in hydroiodic acid, platinum(IV) iodide forms hydrogen hexaiodoplatinate(IV):

PtI4 + 2HI → H2[PtI6]

Related Research Articles

<span class="mw-page-title-main">Hydrogen iodide</span> Chemical compound

Hydrogen iodide (HI) is a diatomic molecule and hydrogen halide. Aqueous solutions of HI are known as hydroiodic acid or hydriodic acid, a strong acid. Hydrogen iodide and hydroiodic acid are, however, different in that the former is a gas under standard conditions, whereas the other is an aqueous solution of the gas. They are interconvertible. HI is used in organic and inorganic synthesis as one of the primary sources of iodine and as a reducing agent.

<span class="mw-page-title-main">Tellurium tetraiodide</span> Chemical compound

Tellurium tetraiodide (TeI4) is an inorganic chemical compound. It has a tetrameric structure which is different from the tetrameric solid forms of TeCl4 and TeBr4. In TeI4 the Te atoms are octahedrally coordinated and edges of the octahedra are shared.

Tin(IV) iodide, also known as stannic iodide, is the chemical compound with the formula SnI4. This tetrahedral molecule crystallizes as a bright orange solid that dissolves readily in nonpolar solvents such as benzene.

<span class="mw-page-title-main">Berkelium compounds</span> Chemical compounds

Berkelium forms a number of chemical compounds, where it normally exists in an oxidation state of +3 or +4, and behaves similarly to its lanthanide analogue, terbium. Like all actinides, berkelium easily dissolves in various aqueous inorganic acids, liberating gaseous hydrogen and converting into the trivalent oxidation state. This trivalent state is the most stable, especially in aqueous solutions, but tetravalent berkelium compounds are also known. The existence of divalent berkelium salts is uncertain and has only been reported in mixed lanthanum chloride-strontium chloride melts. Aqueous solutions of Bk3+ ions are green in most acids. The color of the Bk4+ ions is yellow in hydrochloric acid and orange-yellow in sulfuric acid. Berkelium does not react rapidly with oxygen at room temperature, possibly due to the formation of a protective oxide surface layer; however, it reacts with molten metals, hydrogen, halogens, chalcogens and pnictogens to form various binary compounds. Berkelium can also form several organometallic compounds.

<span class="mw-page-title-main">Trimethylplatinum iodide</span> Chemical compound

Trimethylplatinum iodide is the organoplatinum complex with the formula [(CH3)3PtI]4. It is a white, air-stable solid that was one of the first σ-alkyl metal complexes reported. It arises from the reaction of potassium hexachloroplatinate with methylmagnesium iodide. The complex exists as a tetramer: a cubane-type cluster with four octahedral Pt(IV) centers linked by four iodides as triply bridging ligands. Due to its stability, it is often utilized as a precursor en route to the synthesis of other organoplatinum compound, such as hydrosilylation catalysts. It is also used as a precursor for forming platinum layers for electronics.

Samarium(III) iodide is an inorganic compound, a salt of samarium and hydroiodic acid with the chemical formula SmI
3.

Platinum-samarium is a binary inorganic compound of platinum and samarium with the chemical formula PtSm. This intermetallic compound forms crystals.

<span class="mw-page-title-main">Chromium(II) sulfide</span> Chemical compound

Chromium(II) sulfide is an inorganic compound of chromium and sulfur with the chemical formula CrS. The compound forms black hexagonal crystals, insoluble in water.

Polonium tetraiodide is a binary inorganic compound of polonium and iodine with the chemical formula PoI
4. The compound forms volatile black crystals.

<span class="mw-page-title-main">Praseodymium diiodide</span> Chemical compound

Praseodymium diiodide is a chemical compound with the empirical formula of PrI2, consisting of praseodymium and iodine. It is an electride, with the ionic formula of Pr3+(I−)2e−, and therefore not a true praseodymium(II) compound.

<span class="mw-page-title-main">Zirconium(III) iodide</span> Chemical compound

Zirconium(III) iodide is an inorganic compound with the formula ZrI3.

Europium(III) iodide is an inorganic compound containing europium and iodine with the chemical formula EuI3.

Californium(II) iodide is a binary inorganic compound of californium and iodine with the formula CfI
2.

<span class="mw-page-title-main">Platinum(II) iodide</span> Chemical compound

Platinum(II) iodide is a binary inorganic compound of platinum and iodine with the chemical formula PtI
2.

Iridium(IV) iodide is a binary chemical compound of iridium and iodide with the chemical formula IrI
4.

<span class="mw-page-title-main">Niobium(IV) iodide</span> Chemical compound

Niobium(IV) iodide is an iodide of niobium, with the chemical formula of NbI4.

<span class="mw-page-title-main">Tantalum(IV) iodide</span> Chemical compound

Tantalum(IV) iodide is an inorganic compound with the chemical formula TaI4. It dissolves in water to give a green solution, but the color fades when left in the air and produces a white precipitate.

<span class="mw-page-title-main">Neptunium tetrabromide</span> Chemical compound

Neptunium tetrabromide is a binary inorganic compound of neptunium metal and bromine with the chemical formula NpBr4.

<span class="mw-page-title-main">Protactinium tetrafluoride</span> Chemical compound

Protactinium tetrafluoride is a binary inorganic compound of protactinium metal and fluorine with the chemical formula PaF4.

Protactinium tetraiodide is a binary inorganic compound of protactinium metal and iodine with the chemical formula PaI4.

References

  1. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN   978-0-08-037941-8.
  2. ↑ Wicks, Charles E.; Block, Frank E. (1963). Thermodynamic Properties of 65 Elements: Their Oxides, Halides, Carbides and Nitrides. U.S. Government Printing Office. p. 92. Retrieved 28 March 2024.
  3. ↑ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3510. ISBN   978-0-412-30120-9 . Retrieved 28 March 2024.
  4. ↑ Donnay, Joseph Désiré Hubert (1978). Crystal Data: Inorganic compounds 1967-1969. National Bureau of Standards. p. 153. Retrieved 28 March 2024.
  5. ↑ "Platinum(IV) iodide, 99.95% (Metals basis), Pt 27.3% min., Thermo Scientific Chemicals, Premion | Fisher Scientific". Fisher Scientific . Retrieved 28 March 2024.
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