Cyclohexa-1,4-diene
1,4-Cyclohexadiene is an organic compound with the formula C6H8. It is a colourless, flammable liquid that is of academic interest as a prototype of a large class of related compounds called terpenoids, an example being γ-terpinene. An isomer of this compound is 1,3-cyclohexadiene.
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| Names | |||
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| Preferred IUPAC name
Cyclohexa-1,4-diene | |||
| Other names
1,4-Cyclohexadiene 1,4-Dihydrobenzene | |||
| Identifiers | |||
3D model (JSmol) |
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| Abbreviations | 1,4-CHDN | ||
| 1900733 | |||
| ChEBI | |||
| ChemSpider | |||
| ECHA InfoCard | 100.010.040 | ||
| EC Number |
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| 1656 | |||
| MeSH | 1,4-cyclohexadiene | ||
PubChem CID |
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| UNII | |||
| UN number | 3295 | ||
CompTox Dashboard (EPA) |
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SMILES
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| Properties | |||
| C6H8 | |||
| Molar mass | 80.130 g·mol−1 | ||
| Appearance | Colorless liquid | ||
| Density | 0.847 g cm−3 | ||
| Melting point | −50 °C; −58 °F; 223 K | ||
| Boiling point | 82 °C; 179 °F; 355 K | ||
Magnetic susceptibility (χ) |
-48.7·10−6 cm3/mol | ||
Refractive index (nD) |
1.472 | ||
| Thermochemistry | |||
Heat capacity (C) |
142.2 J K−1 mol−1 | ||
Std molar entropy (S⦵298) |
189.37 J K−1 mol−1 | ||
Std enthalpy of formation (ΔfH⦵298) |
63.0-69.2 kJ mol−1 | ||
Std enthalpy of combustion (ΔcH⦵298) |
-3573.5--3567.5 kJ mol−1 | ||
| Hazards | |||
| GHS labelling: | |||
| Danger | |||
| H225, H340, H350, H373 | |||
| P201, P210, P308+P313 | |||
| NFPA 704 (fire diamond) |
2
3
0 | ||
| Flash point | −7 °C (19 °F; 266 K) | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |||
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