Rhenium tetrafluoride

Rhenium tetrafluoride is a binary inorganic compound of rhenium and fluorine with the chemical formula ReF₄.^[1]

Rhenium tetrafluoride

Names
Other names Rhenium(IV) fluoride
Identifiers
CAS Number	149852-31-3
3D model (JSmol)	Interactive image
ChemSpider	57568799
PubChem CID	18469520
CompTox Dashboard (EPA)	20594153
InChI InChI=1S/4FH.Re/h4*1H;/p-4 Key: IZVAOCKUNBYXSU-UHFFFAOYSA-J
SMILES [F-].[F-].[F-].[F-].[Re]
Properties
Chemical formula	F4Re
Molar mass	262.201 g·mol−1
Appearance	blue crystals
Density	5.38 g/cm3
Melting point	124.5 °C (256.1 °F; 397.6 K)
Boiling point	795 °C (1,463 °F; 1,068 K)
Structure
Crystal structure	tetragonal
Related compounds
Related compounds	Osmium tetrafluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Rhenium tetrafluoride can be made by the reduction of rhenium hexafluoride with hydrogen, rhenium, or sulfur dioxide:^[2][3]

ReF₆ + H₂ → 2ReF₄ + 2HF

2ReF₆ + Re → 3ReF₄

ReF₆ + SO₂ → ReF₄ + SO₂F₂

Physical properties

Rhenium tetrafluoride forms blue crystals^[4] of tetragonal structure, cell parameters a = 1.012 nm, c = 1.595 nm.

Rhenium tetrafluoride reacts with water, and corrodes glass when heated.