Arsenic pentafluoride
Arsenic pentafluoride
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Arsenic pentafluoride

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Arsenic pentafluoride

Arsenic pentafluoride is a chemical compound of arsenic and fluorine. It is a toxic, colorless gas. The oxidation state of arsenic is +5.

Arsenic pentafluoride can be prepared by direct combination of arsenic and fluorine:

It can also be prepared by the reaction of arsenic trifluoride and fluorine:

or the addition of fluorine to arsenic pentoxide or arsenic trioxide.

Arsenic pentafluoride is a colourless gas and has a trigonal bipyramidal structure. In the solid state the axial As−F bond lengths are 171.9 pm and the equatorial 166.8 pm. Its point group is D3h.

Arsenic pentafluoride forms halide complexes and is a powerful fluoride acceptor. An example is the reaction with sulfur tetrafluoride, forming an ionic hexafluoroarsenate complex.

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