Ammonium hexachloroplatinate | |
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Ammonium hexachloroplatinate(IV) |
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Other names
ammonium chloroplatinate |
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Identifiers | |
CAS number | 16919-58-7 |
ChemSpider | 10628022 |
ChEBI | CHEBI:59604 |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | [NH4]2[PtCl6] |
Molar mass | 443.87 g/mol |
Density | 3.07 g/cm3 |
Solubility in other solvents | 0.5 g/100 mL (20 °C) 3.365 g/100 mL (100 °C) |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Ammonium hexachloroplatinate, also known as ammonium chloroplatinate, is a chemical compound with the formula [NH4]2[PtCl6]. 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.
The compound consists of separate tetrahedral ammonium cations and octahedral [PtCl6]2− anions. It is usually generated as a fine yellow precipitate by treating a solution of hexachloroplatinic acid with a solution of an ammonium salt.[1] The complex is so poorly soluble that this step is employed in the isolation of platinum from ores and recycled residues.[2]
Ammonium hexachloroplatinate is used in platinum plating.
Heating [NH4]2[PtCl6] under a stream of hydrogen at 200 °C produces platinum sponge. Treating this with chlorine gives H2PtCl6.[1]