| Hexafluoro-2-butyne | |
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1,1,1,4,4,4-Hexafluoro-2-butyne |
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Other names
HFB |
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| Identifiers | |
| CAS number | 692-50-2 |
| RTECS number | ES0702500 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C4F6 |
| Molar mass | 162.03 g/mol |
| Appearance | Colorless gas |
| Density | 1.602 g/cm3 |
| Melting point |
-117 °C, 156 K, -179 °F |
| Boiling point |
-25 °C, 248 K, -13 °F |
| Solubility in water | Insoluble |
| Structure | |
| Dipole moment | 0 D |
| Hazards | |
| R-phrases | R12 R23 |
| S-phrases | S16 S33 S45 |
| Main hazards | Toxic gas |
| Related compounds | |
| Related compounds | Dimethyl acetylenedicarboxylate Hexachlorobutadiene Acetylene |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Hexafluoro-2-butyne is the fluorocarbon with the formula CF3C≡CCF3. HFB, as it is known also, is a particularly electrophilic acetylene, hence a potent dienophile.[1][2]
It is prepared by the action of sulfur tetrafluoride on acetylenedicarboxylic acid and the reaction of KF with hexachlorobutadiene.