Caesium hexafluorocuprate(IV)

Caesium hexafluorocuprate is a quite rare example of the +4 oxidation state of copper with the chemical formula Cs
₂CuF
₆. It is a red solid at room temperature. It can be produced by mixing CsCuCl
₃, caesium fluoride, and fluorine together at high pressure:[2]

2 CsCuCl₃ + 2 CsF + 5 F₂ → 2 Cs₂CuF₆ + 3 Cl₂

Caesium hexafluorocuprate(IV)

Names
Other names Cesium hexafluorocuprate; Dicesium hexafluorocuprate
Identifiers
CAS Number	43070-30-0
Properties
Chemical formula	Cs2CuF6
Molar mass	443.35 g/mol
Appearance	Red orange crystals[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

References

1. Jane E. Macintyre, ed. (1992). Dictionary of Inorganic Compounds. CRC Press. p. 3100. ISBN 9780412301209.
2. Mary Eagleson (1994). Concise encyclopedia chemistry. Walter de Gruyter. ISBN 3-11-011451-8.

Further reading

• Harnischmacher, Werner; Hoppe, Rudolf (1973). "Vierwertiges Kupfer: Cs₂[CuF₆]". Angewandte Chemie. 85 (13): 590. doi:10.1002/ange.19730851312.
• Müller, Bernd G. (1987). "Fluoride mit Kupfer, Silber, Gold und Palladium". Angewandte Chemie. 99 (11): 1120–1135. doi:10.1002/ange.19870991105.
• Popova, T. V.; Aksenova, N. V. (2003). "Complexes of Copper in Unstable Oxidation States". Russian Journal of Coordination Chemistry. 29 (11): 743. doi:10.1023/B:RUCO.0000003432.39025.cc.
• Grannec, J (1984). "Some physical properties of d-transition metal fluorides in unusual oxidation states". Journal of Fluorine Chemistry. 25: 83–90. doi:10.1016/S0022-1139(00)81198-7.