Names | |
---|---|
IUPAC name
1,2,3,4,5,6,7,8-octafluorocubane
| |
Other names
perfluorocubane
| |
Identifiers | |
3D model (
JSmol)
|
|
PubChem
CID
|
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
C8F8 | |
Molar mass | 248.075 g·mol−1 |
Appearance | colorless, sublimable |
Density | 2.429 g/cm3 |
Melting point | 160.1–171.1 °C (320.2–340.0 °F; 433.2–444.2 K) |
Related compounds | |
Related compounds
|
Octanitrocubane |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Octafluorocubane or perfluorocubane is an organofluorine compound with the formula C8F8, consisting of eight carbon atoms joined into a cube, with a fluorine bonded to each carbon corner. It is a colorless, sublimable solid at room temperature. It has been of longstanding theoretical interest, but was not synthesised until 2022, when it was prepared in several steps from a cubane carboxylic ester beginning with its hepta fluorination. According to X-ray crystallography, the C-C distances (1.570 Å) in octafluorocubane are identical in length to those in the parent cubane (1.572 Å). [1]
Octafluorocubane has attracted interest from theorists because of its unusual
electronic structure,
[2] which is indicated by its susceptibility to undergo reduction to a detectable
anion C
8F−
8, with the free electron trapped inside of the cube.
[3]
The compound was voted "favorite molecule of 2022" by readers of Chemical & Engineering News. [4]