Rhenium heptafluoride

Rhenium heptafluoride

Names
IUPAC name rhenium heptafluoride, heptafluoridorhenium
Identifiers
CAS Number	17029-21-9 Y
3D model (JSmol)	Interactive image
ChemSpider	26323924 N
PubChem CID	123369
InChI InChI=1S/7FH.Re/h7*1H;/q;;;;;;;+7/p-7 N Key: HFHBKXWKPQUYIA-UHFFFAOYSA-G N InChI=1/7FH.Re/h7*1H;/q;;;;;;;+7/p-7/rF7Re/c1-8(2,3,4,5,6)7 Key: HFHBKXWKPQUYIA-KLJGHBABAK
SMILES F[Re](F)(F)(F)(F)(F)F
Properties
Chemical formula	ReF7
Molar mass	319.196 g/mol
Appearance	Bright yellow crystalline solid
Density	4.3g/cm3
Melting point	48.3 °C (118.9 °F; 321.4 K)
Boiling point	73.72 °C (164.70 °F; 346.87 K)
Structure
Crystal structure	triclinic, aP16
Space group	P-1, No. 2
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Rhenium heptafluoride is the compound with the formula ReF₇. It is a yellow low melting solid, and is the only thermally stable metal heptafluoride. It has a distorted pentagonal bipyramidal structure similar to IF₇, which was confirmed by neutron diffraction at 1.5K. The structure is non-rigid as evidenced by electron diffraction studies.

It can be prepared from the elements at 400 °C:

With fluoride donors such as CsF, the ReF₈⁻ anion is formed, which has a square antiprismatic structure. With antimony pentafluoride, SbF₅, a fluoride acceptor, the ReF₆⁺ cation is formed.