Potassium hexachloropalladate(IV)

Potassium hexachloropalladate(IV)

Names
IUPAC name dipotassium;hexachloropalladium(2-)
Other names Dipotassium Hexachloropalladate(2-)
Identifiers
CAS Number	16919-73-6  N
ChEBI	CHEBI:231511
ChemSpider	55724
ECHA InfoCard	100.037.234
EC Number	240-974-6
PubChem CID	61852
CompTox Dashboard (EPA)	DTXSID30926860
InChI InChI=1S/6ClH.2K.Pd/h6*1H;;;/q;;;;;;2*+1;+4/p-6 Key: OEDRXJBJMMJUSV-UHFFFAOYSA-H
Properties
Chemical formula	Cl6K2Pd
Molar mass	397.32 g·mol−1
Appearance	red-brown crystals
Density	2.74 g/cm3
Melting point	525 °C
Solubility in water	Poorly soluble
Hazards
GHS labelling: [1]
Pictograms
Signal word	Warning
Hazard statements	H319
Precautionary statements	P305, P338, P351
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Potassium hexachloropalladate(IV) is an inorganic chemical compound with the chemical formula K₂[PdCl₆]. ^{[2] [3]}

Synthesis

Dissolution of potassium tetrachloropalladate(II) in aqua regia:

3K₂[PdCl₄] + 6HCl + 2HNO₃ → 3K₂[PdCl₆] + 2NO + 4H₂O

Passing chlorine through a suspension of potassium tetrachloropalladate(II) in a solution of potassium chloride: ^[4]

K₂[PdCl₄] + Cl₂ → K₂[PdCl₆]

Physical properties

The compound forms red-brown crystals of cubic crystal system. ^[5]

Poorly soluble in water.

Chemical properties

The compound decomposes when heated or in a hot concentrated hydrochloric acid solution:

K₂[PdCl₆] → K₂[PdCl₄] + Cl₂

Uses

The compound is used in photography. ^[6] Also used as an organic reagent and pharmaceutical intermediate. ^[7]

References

1. "Potassium hexachloropalladate(IV)". Sigma Aldrich . Retrieved 13 March 2025.
2. "Potassium Hexachloropalladate(IV) | AMERICAN ELEMENTS®". American Elements . Retrieved 13 March 2025.
3. "SAFETY DATA SHEET". Thermo Fisher . Retrieved 13 March 2025.
4. Griffith, William P.; Robinson, Stephen D.; Swars, Kurt; Griffith, William P.; Swars, Kurt (1989). Pd Palladium: Palladium Compounds (8th Edition / Achte, völlig neu bearbeitete Auflage ed.). Berlin Heidelberg: Springer. p. 151. ISBN   978-3-662-09190-6.
5. Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. C-252. Retrieved 13 March 2025.
6. Turkington, Robert (26 October 2009). Chemicals Used for Illegal Purposes. John Wiley & Sons. p. 186. ISBN   978-0-470-18780-7 . Retrieved 13 March 2025.
7. "Potassium hexachloropalladate(IV), Pd 26.3% min, Thermo Scientific Chemicals | Fisher Scientific". Fisher Scientific . Retrieved 13 March 2025.