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Ammonium hexachloroplatinate

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Ammonium hexachloroplatinate
Ammonium hexachloroplatinate
Names
IUPAC name Ammonium hexachloroplatinate(IV)
Other names ammonium chloroplatinate
Identifiers
CAS Number
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.037.233 Edit this at Wikidata
CompTox Dashboard (EPA)
InChI
  • InChI=1S/6ClH.2H3N.Pt/h6*1H;2*1H3;/q;;;;;;;;+4/p-4Key: PCCGQTHFYHJATL-UHFFFAOYSA-J
  • InChI=1/6ClH.2H3N.Pt/h6*1H;2*1H3;/q;;;;;;;;+4/p-4/rCl6Pt.2H3N/c1-7(2,3,4,5)6;;/h;2*1H3/q-2;;/p+2Key: PCCGQTHFYHJATL-WPAIPAOFAY
SMILES
  • ..Cl(Cl)(Cl)(Cl)(Cl)Cl
Properties
Chemical formula 2
Molar mass 443.87 g/mol
Density 3.07 g/cm
Solubility in other solvents 0.5 g/100 mL (20 °C)
3.365 g/100 mL (100 °C)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Ammonium hexachloroplatinate, also known as ammonium chloroplatinate, is a chemical compound with the formula 2. It is a rare example of a soluble platinum(IV) salt that is not hygroscopic. It forms intensely yellow solutions in water. In the presence of 1M NH4Cl, its solubility is only 0.0028 g /100 mL.

Preparation and structure

The compound consists of separate tetrahedral ammonium cations and octahedral anions. It is usually generated as a fine yellow precipitate by treating a solution of hexachloroplatinic acid with a solution of an ammonium salt. The complex is so poorly soluble that this step is employed in the isolation of platinum from ores and recycled residues.

Uses and reactions

Ammonium hexachloroplatinate is used in platinum plating.

Heating 2 under a stream of hydrogen at 200 °C produces platinum sponge. Treating this with chlorine gives H2PtCl6.

References

  1. ^ George B. Kauffman; Thurner, Joseph J.; Zatko, David A. (1967). "Ammonium Hexachloroplatinate(IV)". Inorganic Syntheses. 9: 182–185. doi:10.1002/9780470132401.ch51.
  2. Cotton, S. A. Chemistry of Precious Metals, Chapman and Hall (London): 1997. ISBN 0-7514-0413-6.
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