Potassium hexafluoronickelate(IV)

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.

Potassium hexafluoronickelate(IV)
Names
IUPAC name
potassium hexafluoronickelate(IV)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.153.655
Properties
K2NiF6
Molar mass 250.880
Hazards
Safety data sheet External SDS
GHS pictograms [1]
GHS Signal word Danger[1]
GHS hazard statements
 H302, H312, H317, H331, H350[1]
P201, P261, P280, P304+340, P405, P501[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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:[2]

Potassium hexafluoronickelate is a strong oxidant. It can turn chlorine pentafluoride and bromine pentafluoride into ClF+
6 and BrF+
6, respectively:[3]

( X = Cl or Br , -60 °C , aHF = anhydrous hydrogen fluoride).

It adopts the structure seen for K2PtCl6.[4]

References
  1. "Potassium Hexafluoronickelate(IV)". American Elements. Retrieved December 19, 2018.
  2. (in Chinese)张青莲. 《无机化学丛书》第九卷：锰分族、铁系、铂系. 北京: 科学出版社. pp. P333. ISBN 7-03-002238-6.
  3. Schroer, Thorsten; Christe, Karl O. (2001). "Novel Synthesis of ClF6+ and BrF6+ Salts". Inorganic Chemistry. 40 (10): 2415–9. doi:10.1021/ic001024. PMID 11327921.
  4. Taylor, J. C. "A comparison of profile decomposition and Rietveld methods for structurtal refinement with powder diffraction data" Zeitschrift für Kristallographie 1987, volume 181, p151-160.


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