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Chromium (VI) fluoride, also known as chromium hexafluoride is a possible chemical compound with a chromium atom attached to 6 fluorine atoms. It has been unsuccessfully synthesized a number of times by heating up chromium to 400 °C in a fluorine atmosphere at 20 megapascals of pressure and freezing it as it was formed but this was still a failure as this instead produces chromium (V) fluoride or chromium pentafluoride.Is the following possible?

The predicted reaction was:

$$\ce{Cr + 3 F2 -> CrF6}$$

Instead, the following reaction was happening:

$$\ce{2 Cr + 5 F2 -> 2 CrF5}$$

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