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1,4-Cyclohexadiene,3,6-bis(methylene)-

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Gas phase 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

Quantity Value Units Method Reference Comment
Deltafgas50. ± 4.kcal/molIonPollack, Raine, et al., 1981 

Phase change 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: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director

Quantity Value Units Method Reference Comment
Tboil411.47KN/ARintelen, Saylor, et al., 1937Uncertainty assigned by TRC = 0.2 K

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Gas phase ion energetics 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

View reactions leading to C8H8+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)215.2kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity208.8kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
7.87PEDewar, 1982Vertical value; LBLHLM
7.87 ± 0.05PEKoenig, Wielesek, et al., 1975Vertical value; LLK

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, Notes

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

Pollack, Raine, et al., 1981
Pollack, S.K.; Raine, B.C.; Hehre, W.J., Determination of the heats of formation of the isomeric xylylenes by ion cyclotron double-resonance spectroscopy, J. Am. Chem. Soc., 1981, 103, 6308-6313. [all data]

Rintelen, Saylor, et al., 1937
Rintelen, J.C.; Saylor, J.H.; Gross, P.M., The Densities and Vapor Pressures of Some Alkylbenzene, Aliphatic Ketones and n-AMyl Chloride, J. Am. Chem. Soc., 1937, 59, 1129. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Dewar, 1982
Dewar, M.J.S., Ionization energies of p-quinodimethane and 2,5-dimethyl-p-quinodimethane, J. Am. Chem. Soc., 1982, 104, 1447. [all data]

Koenig, Wielesek, et al., 1975
Koenig, T.; Wielesek, R.; Snell, W.; Balle, T., Helium(I) photoelectron spectrum of p-quinodimethane, J. Am. Chem. Soc., 1975, 97, 3225. [all data]


Notes

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