Potassium hexafluoronickelate(IV) - Alchetron, the free social encyclopedia

Formula K2NiF6

Potassium hexafluoronickelate(IV) is an inorganic compound with the chemical formula K
2NiF
6. It can be produced through the reaction of potassium fluoride, nickel dichloride, and fluorine.

It reacts violently with water, releasing oxygen. It dissolves in anhydrous hydrogen fluoride to produce a light-red solution. Potassium hexafluoronickelate(IV) decomposes at 350 °C, forming potassium hexafluoronickelate(III), nickel(II) fluoride, and fluorine:

3 K 2 N i F 6 → Δ 2 K 3 N i F 6 + N i F 2 + F 2

Potassium hexafluoronickelate is a strong oxidant. It can turn chlorine pentafluoride and bromine pentafluoride into ClF+
6 and BrF+
6, respectively:

K 2 N i F 6 + 5 A s F 5 + X F 5 → a H F X F 6 A s F 6 + N i ( A s F 6 ) 2 + 2 K A s F 6 ( X = Cl or Br , -60 °C , aHF = anhydrous hydrogen fluoride).

It adopts the structure seen for K₂PtCl₆.

References

Potassium hexafluoronickelate(IV) Wikipedia

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