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Caesium hexafluorocuprate is the inorganic compound with the chemical formula Cs2CuF6. It is a red solid that degrades upon contact with water. It was first prepared be heating CsCuCl3 and caesium fluoride at 410°C under 350 atmospheres of fluorine:
The anion is a rare example of a copper complex. In terms of its electronic structure, the anion has a low-spin d configuration. It is thus susceptible to Jahn-Teller distortion.
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