Hexafluorocyclobutene
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| Preferred IUPAC name
1,2,3,3,4,4-Hexafluorocyclobut-1-ene | |
| Other names
1,2,3,3,4,4-hexafluorocyclobutene, perfluorocyclobutene | |
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| Properties | |
| C4F6 | |
| Molar mass | 162.034 g·mol−1 |
| Appearance | colorless gas |
| Melting point | −60 °C (−76 °F; 213 K) |
| Boiling point | 5.5 °C (41.9 °F; 278.6 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Hexafluorocyclobutene is the organofluorine compound with the formula (CF2)2(CF)2. A colorless gas, it is a precursor to a variety of compounds, including squaric acid. Hexafluorocyclobutene is prepared in two steps from chlorotrifluoroethylene. The thermal dimerization gives 1,2-dichloro-1,2,3,3,4,4-hexafluorocyclobutane. Dechlorination of the latter gives hexafluorocyclobutene:
- C4F6Cl2 + Zn → C4F6 + ZnCl2