|Systematic IUPAC name
3D model (JSmol)
|Molar mass||80.13 g·mol−1|
|Density||0.847 g cm−3|
|Melting point||−50 °C; −58 °F; 223 K|
|Boiling point||82 °C; 179 °F; 355 K|
Refractive index (nD)
|142.2 J K−1 mol−1|
|189.37 J K−1 mol−1|
Std enthalpy of
|63.0-69.2 kJ mol−1|
Std enthalpy of
|-3573.5--3567.5 kJ mol−1|
|GHS signal word||DANGER|
|H225, H340, H350, H373|
|P201, P210, P308+313|
|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).
|what is ?)(|
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 examples being γ-terpinene. An isomer exists of this compound, 1,3-cyclohexadiene.
Synthesis and reactions
In the laboratory, substituted 1,4-cyclohexadienes are synthesized by Birch reduction of related aromatic compounds using an alkali metal and a proton donor such as ammonia. In this way, over reduction to the fully saturated ring is avoided.
1,4-Cyclohexadiene and its derivatives are easily aromatized, the driving force being the formation of an aromatic ring. The conversion to an aromatic system may be used to trigger other reactions, such as the Bergman cyclization.
- "1,4-cyclohexadiene - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 27 March 2005. Identification and Related Records. Retrieved 12 October 2011.
- John C. Walton, Fernando Portela-Cubillo "1,4-Cyclohexadiene" Encyclopedia of Reagents for Organic Synthesis 2007 John Wiley & Sons. doi:10.1002/047084289X.rn00806
- The photochemistry of 1,4-cyclohexadiene in solution and in the gas phase
- NIST Chemistry WebBook Reaction thermochemistry data