[18]-Annulene


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
Δfgas67.0 ± 6.0kcal/molCcbBeezer, Mortimer, et al., 1965 

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
Δfsolid39.0 ± 4.0kcal/molCcbBeezer, Mortimer, et al., 1965 
Quantity Value Units Method Reference Comment
Δcsolid-2346.8 ± 4.0kcal/molCcbBeezer, Mortimer, et al., 1965Corresponding Δfsolid = 39.0 kcal/mol (simple calculation by NIST; no Washburn corrections)

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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Δsub28. ± 2.kcal/molEBeezer, Mortimer, et al., 1965ALS
Δsub27.96kcal/molN/ABeezer, Mortimer, et al., 1965DRB

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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Ionization energy determinations

IE (eV) Method Reference Comment
6.60PEBaumann, Bunzli, et al., 1982LBLHLM
7.23PEBaumann, Bunzli, et al., 1982Vertical value; LBLHLM

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.

Beezer, Mortimer, et al., 1965
Beezer, A.E.; Mortimer, C.T.; Springall, H.D.; Sondheimer, F.; Wolovsky, R., 33. The heat of combustion of cyclo-octadecanonaene ([18]annulene), J. Chem. Soc., 1965, 216-220. [all data]

Baumann, Bunzli, et al., 1982
Baumann, H.; Bunzli, J.-C.; Oth, J.F.M., 58. The photoelectron spectrum of [18]annulene, Helv. Chim. Acta, 1982, 65, 582. [all data]


Notes

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