Chromium hexafluoride

Chromium hexafluoride or chromium(VI) fluoride (CrF₆) is a hypothetical chemical compound with the chemical formula CrF₆. It was previously thought to be an unstable yellow solid decomposing at −100 °C, but this has been shown to be a misidentification of chromium pentafluoride, CrF₅.

CrF₆ used to be thought to be produced by exhaustive fluorination of chromium metal at 400 °C and 20 million pascals of pressure, and immediate freezing out of the reaction chamber to prevent decomposition:

However, it has been shown that chromium pentafluoride (CrF₅) is formed instead:

and that CrF₆ has yet to be synthesized.

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