Ammonium hexachloropalladate

Ammonium hexachloropalladate

Names
IUPAC name diazanium; hexachloropalladium(2-)
Other names Ammonium hexachloropalladate(IV)
Identifiers
CAS Number	19168-23-1
3D model (JSmol)	Interactive image
ChemSpider	56476
ECHA InfoCard	100.038.943
EC Number	242-854-9
PubChem CID	24859373
CompTox Dashboard (EPA)	DTXSID40893973
InChI InChI=1S/6ClH.2H3N.Pd/h6*1H;2*1H3;/q;;;;;;;;+4/p-4 Key: LOLIPEAFAJNGJM-UHFFFAOYSA-J
SMILES [NH4+].[NH4+].Cl[Pd-2](Cl)(Cl)(Cl)(Cl)Cl
Properties
Chemical formula	Cl6H8N2Pd
Molar mass	355.20 g·mol−1
Appearance	red-brown crystals
Density	2.148 g/cm3
Solubility in water	slightly soluble
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium hexachloropalladate is an inorganic chemical compound with the chemical formula (NH₄)₂PdCl₆. ^{[1] [2]}

Synthesis

Ammonium hexachloropalladate can be made by passing chlorine through a suspension of ammonium tetrachloropalladate(II) in ammonium chloride solution:

(NH₄)₂[PdCl₄] + Cl₂ → (NH₄)₂[PdCl₆]

The compound is precipitated from the palladium(IV) chloride solution with adding ammonium chloride: ^[3]

PdCl₆ + 2NH₄Cl → (NH₄)₂[PdCl₆] + 2HCl

Physical properties

Ammonium hexachloropalladate forms red-brown crystals ^[4] of cubic system, space group Fm3m, cell parameters a = 0.983 nm, Z = 4. ^[5]

It is slightly soluble in water.

Chemical properties

The compound decomposes upon heating to form ammonium tetrachloropalladate(II):

(NH₄)₂[PdCl₆] → (NH₄)₂[PdCl₄] + Cl₂

References

1. "Ammonium hexachloropalladate(IV)". Sigma Aldrich . Retrieved 7 October 2024.
2. "Ammonium Hexachloropalladate(IV)". American Elements . Retrieved 7 October 2024.
3. Guindy, M. I. El (22 October 2013). Precious Metals 1982: Proceedings of the Sixth International Precious Metals Institute Conference, Held in Newport Beach, California, June 7 - 11, 1982. Elsevier. p. 466. ISBN   978-1-4831-8948-2 . Retrieved 7 October 2024.
4. Lide, David R. (9 March 1995). CRC Handbook of Chemistry and Physics: A Ready-reference Book of Chemical and Physical Data. CRC Press. p. 4-41. ISBN   978-0-8493-0595-5 . Retrieved 7 October 2024.
5. Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. 254. Retrieved 7 October 2024.