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Potassium tetrachloroplatinate



Potassium tetrachloroplatinate
IUPAC name Potassium tetrachloroplatinate(II)
Other names Potassium tetrachloroplatinate
Potassium Chloroplatinite
Identifiers
CAS number 10025-99-7
Properties
Molecular formula Cl4K2Pt
Molar mass 415.09
Appearance reddish solid
Density 3.38 g/cm3
Solubility in water 0.93 g/100 mL (16 °C)
5.3/100 mL (100 °C)
Hazards
Main hazards allegenic
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Potassium tetrachloroplatinate is the chemical compound with the formula K2PtCl4. This reddish pink-colored salt is an important reagent for the preparation of other coordination complexes of platinum. It consists of potassium cations and the square planar dianion PtCl42-.

K2PtCl4 is prepared by reduction of K2PtCl6 with hydrazine.[1] K2PtCl6 is one of the salts that is most easily obtained from platinum ores. The complex is appreciably soluble only in water. Treatment with alcohols, especially in the presence of base, causes reduction to platinum metal. Conversion to organic salts, such as [PPN]2PtCl4 are soluble in chlorocarbons. [2]

The chloride ligands on PtCl42- are displaced by many other ligands to afford derivatives:

K2PtCl4 + 2 PPh3 → cis-PtCl2(PPh3)2 + 2 KCl

The anti-cancer drug Cisplatin can similarly be prepared:[1]

K2PtCl4 + 2 NH3 → cis-PtCl2(NH3)2 + 2 KCl

References

  1. ^ a b Keller, R. N.; Moeller, T. ”Potassium Tetrachloroplatinate(II)" Inorganic Syntheses 1963, volume VII, pp.247-250.
  2. ^ Elding, L. I.; Oskarsson, A.; Kukushkin, V. Yu "Platinum Complexes Suitable as Precursors for Synthesis in Nonaqueous Solvents" Inorganic Syntheses, 1997, volume 31, pp 276-279.SBN: 9780471152880.
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Potassium_tetrachloroplatinate". A list of authors is available in Wikipedia.
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