Bicyclo[3.2.1]octa-2,6-diene


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
Δfgas37.7 ± 0.2kcal/molChydRoth, Adamczak, et al., 1991 
Δfgas38.0 ± 1.5kcal/molCcbHassenruck, Martin, et al., 1987 

Condensed 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
Δfliquid28.8 ± 0.8kcal/molCcbHassenruck, Martin, et al., 1987 

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: Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Δvap9.32kcal/molN/AHassenruck, Martin, et al., 1987 

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 as indicated in comments:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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Individual Reactions

C8H9- + Hydrogen cation = Bicyclo[3.2.1]octa-2,6-diene

By formula: C8H9- + H+ = C8H10

Quantity Value Units Method Reference Comment
Δr379.5 ± 2.1kcal/molG+TSLee and Squires, 1986gas phase; 1.4 kcal > MeOH; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Δr372.6 ± 2.0kcal/molIMRELee and Squires, 1986gas phase; 1.4 kcal > MeOH; value altered from reference due to change in acidity scale; B

2Hydrogen + Bicyclo[3.2.1]octa-2,6-diene = Bicyclo[3.2.1]octane

By formula: 2H2 + C8H10 = C8H14

Quantity Value Units Method Reference Comment
Δr-60.8 ± 0.2kcal/molChydRoth, Adamczak, et al., 1991liquid phase; ALS
Δr-57.86 ± 0.27kcal/molChydTurner, Jarrett, et al., 1973liquid phase; solvent: Acetic acid; ALS

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 compiled as indicated in comments:
B - John E. Bartmess
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C8H10+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
8.44 ± 0.01PIDemeo and El-Sayed, 1970RDSH

De-protonation reactions

C8H9- + Hydrogen cation = Bicyclo[3.2.1]octa-2,6-diene

By formula: C8H9- + H+ = C8H10

Quantity Value Units Method Reference Comment
Δr379.5 ± 2.1kcal/molG+TSLee and Squires, 1986gas phase; 1.4 kcal > MeOH; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Δr372.6 ± 2.0kcal/molIMRELee and Squires, 1986gas phase; 1.4 kcal > MeOH; value altered from reference due to change in acidity scale; B

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry 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.

Roth, Adamczak, et al., 1991
Roth, W.R.; Adamczak, O.; Breuckmann, R.; Lennartz, H.-W.; Boese, R., Die Berechnung von Resonanzenergien; das MM2ERW-Kraftfeld, Chem. Ber., 1991, 124, 2499-2521. [all data]

Hassenruck, Martin, et al., 1987
Hassenruck, K.; Martin, H.-D.; Mayer, B.; Urbanek, T.; Zirwes, T.; Walsh, R.; Beckhaus, H.-D., An Experimental Approach to the C8H10 Hypersurface. Kinetic and Thermochemical Investigations on a Formally Forbidden Ground-state [2σ + 2π] Cycloaddition, Chem. Ber., 1987, 120, 177-186. [all data]

Lee and Squires, 1986
Lee, R.E.; Squires, R.R., Anionic homoaromaticity: A gas phase experimental study, J. Am. Chem. Soc., 1986, 105, 5078. [all data]

Turner, Jarrett, et al., 1973
Turner, R.B.; Jarrett, A.D.; Goebel, P.; Mallon, B.J., Heats of hydrogenation. 9. Cyclic acetylenes and some miscellaneous olefins, J. Am. Chem. Soc., 1973, 95, 790-792. [all data]

Demeo and El-Sayed, 1970
Demeo, D.A.; El-Sayed, M.A., Ionization potential and structure of olefins, J. Chem. Phys., 1970, 52, 2622. [all data]


Notes

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