1,3-Cyclohexadiene

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1,3-Cyclohexadiene
IUPAC name Cyclohexa-1,3-diene
Other names 1,3-Cyclohexadiene, 1,2-Dihydrobenzene, 1,3-CHD
Identifiers
3D model (JSmol)
ChEBI
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RTECS number GU4702350
Properties
C6H8
Molar mass 80.13 g/mol
Appearance Colourless liquid
Density 0.841 g/cm³
Melting point
Boiling point
Hazards
EU classification {{{value}}}
R-phrases R11
S-phrases S9, S16, S29, S33
Flash point {{{value}}}
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

1,3-Cyclohexadiene is a highly flammable cycloalkene that occurs as a colorless clear liquid. Its refractive index is 1.475 (20 °C, D).

It can be used as a hydrogen donor in transfer hydrogenation, since its conversion to benzene + hydrogen is in fact exothermic (-24.3 kJ/mol in the gas phase, as indicated by heats of hydrogenation).[1][2] Despite this apparent instability with respect to benzene, the 1,3-cyclohexadiene motif is found in several natural products such as α-terpinene.

See also

References

  1. "1,3-Cyclohexadiene". US National Institute of Standards and Technology. 2007-04-13. Retrieved 2007-04-13.
  2. "Benzene". US National Institute of Standards and Technology. 2007-04-13. Retrieved 2007-04-13.

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