Rhenium pentafluoride

Rhenium pentafluoride is a binary inorganic compound of rhenium and fluorine with the chemical formula ReF5. This is a salt of rhenium and hydrofluoric acid.

Synthesis
Rhenium pentafluoride can be synthesised by the reduction of rhenium hexafluoride with hydrogen, rhenium, or tungsten:


 * 2ReF6 + H2 -> 2ReF5 + 2HF


 * 5ReF6 + Re -> 6ReF5


 * 6ReF6 + W -> 6ReF5 + WF6

Physical properties
Rhenium pentafluoride forms yellow-green crystals of orthorhombic crystal system, cell parameters a = 0.57 nm, b = 1.723 nm, c = 0.767 nm.

Rhenium pentafluoride reacts with water.

Rhenium pentafluoride is volatile. The compound consists of dimers of composition Re2F10.