1,4-Cyclohexadiene, 1-ethyl-


Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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Individual Reactions

1,4-Cyclohexadiene, 1-ethyl- = E,Z-3-Ethylidenecyclohexene

By formula: C8H12 = C8H12

Quantity Value Units Method Reference Comment
Δr-2.2 ± 0.31kcal/molEqkTaskinen and Nummelin, 1994liquid phase; solvent: Dimethylsulfoxide

1,4-Cyclohexadiene, 1-ethyl- = 1-Ethyl-1,3-cyclohexadiene

By formula: C8H12 = C8H12

Quantity Value Units Method Reference Comment
Δr-0.02 ± 0.05kcal/molEqkTaskinen and Nummelin, 1994liquid phase; solvent: Dimethylsulfoxide

2-Ethyl-1,3-cyclohexadiene = 1,4-Cyclohexadiene, 1-ethyl-

By formula: C8H12 = C8H12

Quantity Value Units Method Reference Comment
Δr-0.65 ± 0.29kcal/molEqkTaskinen and Nummelin, 1994liquid phase; solvent: Dimethylsulfoxide

Gas Chromatography

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

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Column type Active phase Temperature (C) I Reference Comment
CapillarySE-30130.910.Bredael, 1982Column length: 100. m; Column diameter: 0.5 mm
CapillarySE-3080.900.Bredael, 1982Column length: 100. m; Column diameter: 0.5 mm

Normal alkane RI, non-polar column, custom temperature program

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Column type Active phase I Reference Comment
CapillarySqualane900.Chen, 2008Program: not specified
CapillaryOV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc.900.Waggott and Davies, 1984Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Taskinen and Nummelin, 1994
Taskinen, E.; Nummelin, K., Relative thermodynamic stabilities of 3-ethylidenecyclohexenes and isomeric ethylcyclohexadienes, Tetrahedron, 1994, 50, 11693-11698. [all data]

Bredael, 1982
Bredael, P., Retention indices of hydrocarbons on SE-30, J. Hi. Res. Chromatogr. Chromatogr. Comm., 1982, 5, 6, 325-328, https://doi.org/10.1002/jhrc.1240050610 . [all data]

Chen, 2008
Chen, H.-F., Quantitative prediction of gas chromatography retention indices with support vector machines, radial basis neutral networks and multiple linear regression, Anal. Chim. Acta, 2008, 609, 1, 24-36, https://doi.org/10.1016/j.aca.2008.01.003 . [all data]

Waggott and Davies, 1984
Waggott, A.; Davies, I.W., Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]


Notes

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