Caesium hexafluorocuprate(IV)
Names
Other names
Cesium hexafluorocuprate; Dicesium hexafluorocuprate
Identifiers
3D model (JSmol)
  • InChI=1S/2Cs.Cu.6FH/h;;;6*1H/q2*+1;+4;;;;;;/p-6
    Key: JSYFPWMRKBASLN-UHFFFAOYSA-H
  • [Cs+].[Cs+].F[Cu-2](F)(F)(F)(F)F
Properties
Cs2CuF6
Molar mass 443.35 g/mol
Appearance Red orange solid[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Caesium hexafluorocuprate is the inorganic compound with the chemical formula Cs
2
CuF
6
. It is a red solid that degrades upon contact with water. It was first prepared be heating CsCuCl
3
and caesium fluoride at 410°C under 350 atmospheres of fluorine:[2]

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

The anion [CuF6]2- is a rare example of a copper(IV) complex. In terms of its electronic structure, the anion has a low-spin d7 configuration. It is thus susceptible to Jahn-Teller distortion.[3]

References

  1. ^ Jane E. Macintyre, ed. (1992). Dictionary of Inorganic Compounds. CRC Press. p. 3100. ISBN 9780412301209.
  2. ^ Harnischmacher, Werner; Hoppe, Rudolf (1973). "Tetravalent Copper: Cs2[CuF6]". Angewandte Chemie International Edition in English. 12 (7): 582–583. doi:10.1002/anie.197305822.
  3. ^ Grannec, J.; Tressaud, A.; Hagenmuller, P. (1984). "Some physical properties of d-transition metal fluorides in unusual oxidation states". Journal of Fluorine Chemistry. 25 (1): 83–90. Bibcode:1984JFluC..25...83G. doi:10.1016/S0022-1139(00)81198-7.

Further reading