Ammonium tetrachloropalladate(II)

Ammonium tetrachloropalladate(II)

Names
IUPAC name diazanium;tetrachloropalladium(2-)
Other names Ammonium tetrachloropalladate, ammonium palladium chloride, diammonium tetrachloropalladate
Identifiers
CAS Number	13820-40-1  N
3D model (JSmol)	Interactive image
ChEBI	CHEBI:60149
ECHA InfoCard	100.034.075
EC Number	237-498-6
PubChem CID	24852355
CompTox Dashboard (EPA)	DTXSID301014530
InChI InChI=1S/4ClH.2H3N.Pd/h4*1H;2*1H3;/q;;;;;;+2/p-2 Key: IRKVTUVFHGUMMN-UHFFFAOYSA-L
SMILES [H][N+]([H])([H])[H].[H][N+]([H])([H])[H].Cl[Pd--](Cl)(Cl)Cl
Properties
Chemical formula	Cl4H8N4Pd
Molar mass	312.31 g·mol−1
Appearance	brown to green crystals
Density	2.17 g/cm3
Melting point	140 °C
Solubility in water	soluble
Hazards
GHS labelling: [1]
Pictograms
Signal word	Warning
Hazard statements	H302, H312, H315, H319, H332, H335
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium tetrachloropalladate(II) is a chemical compound with the chemical formula (NH₄)₂PdCl₄. ^{[2] [3]}

Synthesis

Slow evaporation of mixtures of solutions of tetrachloropalladium acid and ammonium chloride:

H₂[PdCl₄] + 2NH₄Cl → (NH₄)₂[PdCl₄] + HCl

Passing chlorine through a palladium black suspension in a concentrated ammonium chloride solution:

Pd + Cl₂ + 2NH₄Cl → (NH₄)₂[PdCl₄]

Physical properties

Ammonium tetrachloropalladate(II) forms brown to olive green crysrals ^[4] of tetragonal crystal system, space group P 4/mmm, cell parameters: a = 0.721 nm, c = 0.426 nm, Z = 1.

Soluble in water, ^[5] insolible in ethanol.

Chemical properties

With the gradual addition of ammonia, the insoluble Vauquelin salt is formed. ^[6]

2(NH₄)₂[PdCl₄] + 4NH₃ → [Pd(NH₃)₄][PdCl₄] + 4NH₄Cl

Uses

The compound is used for the preparation of palladium metallic particles. In addition, it forms Pd-creatinine complexes, which is used in the field of catalysis and semiconductors. ^[7]

See also

• Sodium tetrachloropalladate(II)
• Potassium tetrachloropalladate(II)

References

1. "Ammonium tetrachloropalladate(II)". Sigma Aldrich . Retrieved 12 March 2025.
2. Malde, Pradip; Ware, Mike (30 December 2020). Platinotype: Making Photographs in Platinum and Palladium with the Contemporary Printing-out Process. Routledge. p. 63. ISBN   978-1-000-28116-3 . Retrieved 12 March 2025.
3. "Ammonium Tetrachloropalladate(II) | AMERICAN ELEMENTS®". American Elements . Retrieved 12 March 2025.
4. Perry, Dale L. (19 April 2016). Handbook of Inorganic Compounds. CRC Press. p. 34. ISBN   978-1-4398-1462-8 . Retrieved 12 March 2025.
5. Haynes, William M. (22 June 2012). CRC Handbook of Chemistry and Physics, 93rd Edition. CRC Press. p. 4-48. ISBN   978-1-4398-8049-4 . Retrieved 12 March 2025.
6. Inorganic Syntheses, Volume 8. John Wiley & Sons. 22 September 2009. p. 234. ISBN   978-0-470-13274-6 . Retrieved 12 March 2025.
7. "Ammonium tetrachloropalladate(II), Premion , 99.998% (metals basis), Pd 37%, Thermo Scientific Chemicals | Fisher Scientific". Fisher Scientific . Retrieved 12 March 2025.