Caesium hexafluorocuprate is the inorganic compound with the chemical formula . It is a red solid that degrades upon contact with water. It was first prepared by heating and caesium fluoride at 410 ðC under 350 atmospheres of fluorine:
The anion [CuF<sub>6</sub>]<sup>2-</sup> is a rare example of a copper(IV) complex. In terms of its electronic structure, the anion has a low-spin d<sup>7</sup> configuration. It is thus susceptible to Jahn-Teller distortion.