Rhenium heptafluoride
 | |
| Names | |
|---|---|
| IUPAC name
rhenium heptafluoride, heptafluoridorhenium
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
| ECHA InfoCard | Lua error in Module:Wikidata at line 880: attempt to index field 'wikibase' (a nil value). Lua error in Module:Wikidata at line 880: attempt to index field 'wikibase' (a nil value).Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value). |
| E number | Lua error in Module:Wikidata at line 880: attempt to index field 'wikibase' (a nil value). |
PubChem CID
|
|
| UNII | |
CompTox Dashboard (EPA)
|
|
| |
| |
| Properties | |
| ReF7 | |
| Molar mass | 319.196 g/mol |
| Appearance | Bright yellow crystalline solid |
| Density | 4.3 g/cm3 |
| Melting point | 48.3 °C (118.9 °F; 321.4 K) |
| Boiling point | 73.72 °C (164.70 °F; 346.87 K) |
| Reacts | |
| Vapor pressure | 13.41 kPa[1] |
| Structure | |
| triclinic, aP16 | |
| P1 (No. 2) | |
| Thermochemistry | |
Enthalpy of fusion (ΔfH⦵fus)
|
7.53 kJ/mol[1] |
Enthalpy of vaporization (ΔfHvap)
|
30.77 kJ/mol[1] |
| Related compounds | |
Related compounds
|
Osmium heptafluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Rhenium heptafluoride is the compound with the formula ReF7. It is a yellow low melting solid and is the only thermally stable metal heptafluoride.[2] It has a distorted pentagonal bipyramidal structure similar to IF7, which was confirmed by neutron diffraction at 1.5 K.[3] The structure is non-rigid, as evidenced by electron diffraction studies.[4]
Production, reactions and properties
[edit | edit source]Rhenium heptafluoride can be prepared from the elements at 400 °C:[5]
- 2 Re + 7 F2 → 2 ReF7
It also can be produced by the explosion of rhenium metal under sulfur hexafluoride. [6]
It hydrolyzes under a base to form perrhenic acid and hydrogen fluoride:[1]
- ReF7 + 4H2O → HReO4 + 7HF
With fluoride donors such as CsF, the ReF−
8 anion is formed, which has a square antiprismatic structure.[7] With antimony pentafluoride, SbF5, a fluoride acceptor, the ReF+
6 cation is formed.[5]
References
[edit | edit source]- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).