Platinum(IV) chloride

Platinum(IV) chloride
Identifiers
CAS number 13454-96-1
ChemSpider 19957150
Jmol-3D images Image 1
Properties
Molecular formula PtCl4
Molar mass 336.89 g/mol
Appearance brown-red powder
Density 4.303 g/cm3 (anhydrous)
2.43 g/cm3 (pentahydrate)
Melting point

370 °C, decomposes

Boiling point

decompose

Solubility in water dissolves (anhydrous)
very soluble (pentahydrate)
Solubility anhydrous
soluble in acetone
slightly soluble in ethanol
insoluble in ether
pentahydrate
soluble in alcohol, ether
Hazards
EU classification not listed
Related compounds
Other anions platinum(IV) fluoride, platinum disulfide, platinum tetrabromide
Other cations iridium tetrachloride
Related compounds platinum(II) chloride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Platinum(IV) chloride is the inorganic compound of platinum and chlorine with the empirical formula PtCl4. This brown solid features platinum in the 4+ oxidation state.

Structure

Typical of Pt(IV), the metal centers adopt an octahedral coordination geometry, {PtCl6}. This geometry is achieved by forming a polymer wherein half of the chloride ligands bridge between the platinum centers. Because of its polymeric structure, PtCl4 dissolves only upon breaking the chloride bridging ligands. Thus, addition of HCl give H2PtCl6. Lewis base adducts of Pt(IV) of the type cis-PtCl4L2 are known, but most are prepared by oxidation of the Pt(II) derivatives.

Platinum(IV)-chloride-CM-3D-balls.png
Part of a (PtCl4) chain from the crystal structure of platinum(IV) chloride

Formation and reactions

PtCl4 is mainly encountered in the handling of chloroplatinic acid, obtained by dissolving of Pt metal in aqua regia. Heating H2PtCl6 gives PtCl4:

H2PtCl6 → PtCl4 + 2 HCl

If excess acids are removed, PtCl4 crystallizes from aqueous solutions in large red crystals of pentahydrate PtCl4·5(H2O),[1] which can be dehydrated by heating to about 300 °C in a current of dry chlorine. The pentahydrate is stable and is used as the commercial form of PtCl4.

Treatment of PtCl4 with aqueous base gives the [Pt(OH)6]2− ion. With methyl Grignard reagents followed by partial hydrolysis, PtCl4 converts to the cuboidal cluster [Pt(CH3)3(OH)]4.[2] Upon heating PtCl4 evolves chlorine to give PtCl2:

PtCl4 → PtCl2 + Cl2

The heavier halides, PtBr4 and PtI4, are also known.

References

  1. Cotton, S. A. Chemistry of Precious Metals, Chapman and Hall (London): 1997. ISBN 0-7514-0413-6.
  1. ^ George Samuel Newth (1920). A text-book of inorganic chemistry. Longmans, Green, and co. p. 694. http://books.google.com/books?id=n6A9AAAAIAAJ. 
  2. ^ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Platinum(II) chloride — Other names platinous chloride …   Wikipedia

  • platinum(II) chloride — platinos(II) chloridas statusas T sritis chemija formulė PtCl₂ atitikmenys: angl. platinum dichloride; platinum(II) chloride rus. платина двухлористая; платины дихлорид; платины(II) хлорид ryšiai: sinonimas – platinos dichloridas …   Chemijos terminų aiškinamasis žodynas

  • platinum(III) chloride — platinos(III) chloridas statusas T sritis chemija formulė PtCl₃ atitikmenys: angl. platinum trichloride; platinum(III) chloride rus. платина треххлористая; платины трихлорид; платины(III) хлорид ryšiai: sinonimas – platinos trichloridas …   Chemijos terminų aiškinamasis žodynas

  • platinum(IV) chloride — platinos(IV) chloridas statusas T sritis chemija formulė PtCl₄ atitikmenys: angl. platinum tetrachloride; platinum(IV) chloride rus. платина четыреххлористая; платины тетрахлорид; платины(IV) хлорид ryšiai: sinonimas – platinos tetrachloridas …   Chemijos terminų aiškinamasis žodynas

  • platinum(I) chloride — platinos(I) chloridas statusas T sritis chemija formulė PtCl atitikmenys: angl. platinum(I) chloride rus. платина хлористая; платины(I) хлорид …   Chemijos terminų aiškinamasis žodynas

  • Platinum — This article is about the chemical element. For other uses, see Platinum (disambiguation). iridium ← platinum → gold Pd ↑ Pt ↓ Ds …   Wikipedia

  • Platinum(II) bromide — Chembox new Name = Platinum(II) bromide ImageFile = Platinum(II) bromide.png ImageName = IUPACName = Platinum(II) bromide OtherNames = Platinous bromide Section1 = Chembox Identifiers CASNo = 13455 12 4 RTECS = Section2 = Chembox Properties… …   Wikipedia

  • Platinum(IV) bromide — Chembox new Name = Platinum(IV) bromide ImageFile = ImageSize = ImageName = IUPACName = Platinum(IV) bromide OtherNames = Platinic bromide Section1 = Chembox Identifiers CASNo = 68936 92 1 RTECS = PubChem = Section2 = Chembox Properties Formula …   Wikipedia

  • platinum dichloride — platinos(II) chloridas statusas T sritis chemija formulė PtCl₂ atitikmenys: angl. platinum dichloride; platinum(II) chloride rus. платина двухлористая; платины дихлорид; платины(II) хлорид ryšiai: sinonimas – platinos dichloridas …   Chemijos terminų aiškinamasis žodynas

  • platinum trichloride — platinos(III) chloridas statusas T sritis chemija formulė PtCl₃ atitikmenys: angl. platinum trichloride; platinum(III) chloride rus. платина треххлористая; платины трихлорид; платины(III) хлорид ryšiai: sinonimas – platinos trichloridas …   Chemijos terminų aiškinamasis žodynas


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.