Ammonium hexachloropalladate

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

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

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