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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
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C6H12+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)9.88 ± 0.03eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)686.9kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity666.9kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
9.80 ± 0.05EIHolmes and Lossing, 1991LL
10.0 ± 0.03EIArimura and Yoshikawa, 1984LBLHLM
9.82EQSieck and Mautner(Meot-Ner), 1982LBLHLM
9.88 ± 0.10EQLias, 1982LBLHLM
9.88PEKovac and Klasinc, 1978LLK
9.88 ± 0.02PEBieri, Burger, et al., 1977LLK
9.88EILossing and Traeger, 1975LLK
9.89 ± 0.01PERang, Paldoia, et al., 1974LLK
9.83 ± 0.05EIPuttemans, 1974LLK
9.84PEPuttemans, 1974LLK
9.88 ± 0.01PISergeev, Akopyan, et al., 1973LLK
9.87PEIkuta, Yoshihara, et al., 1973LLK
9.88 ± 0.01SRaymonda, 1972LLK
9.89PEDemeo and Yencha, 1970RDSH
9.81PEDewar and Worley, 1969RDSH
9.79PEAl-Joboury and Turner, 1964RDSH
9.88 ± 0.02PIWatanabe, 1957RDSH
11.0 ± 0.2EIHustrulid, Kusch, et al., 1938RDSH
10.32PEKimura, Katsumata, et al., 1981Vertical value; LLK
10.3 ± 0.1PEBieri, Burger, et al., 1977Vertical value; LLK
10.3PEBruckmann and Klessinger, 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C3H5+13.20 ± 0.08C3H7EIRabbih, Selim, et al., 1981LLK
C3H6+12.00 ± 0.07C3H6EIRabbih, Selim, et al., 1981LLK
C3H6+11.23 ± 0.04C3H6PISergeev, Akopyan, et al., 1973LLK
C3H7+13.50 ± 0.08C3H5EIRabbih, Selim, et al., 1981LLK
C3H7+11.49 ± 0.03C3H5PISergeev, Akopyan, et al., 1973LLK
C4H7+11.21 ± 0.04C2H5PISergeev, Akopyan, et al., 1973LLK
C4H8+11.15 ± 0.03C2H4EIRabbih, Selim, et al., 1981LLK
C4H8+11.45C2H4EIPuttemans, 1974LLK
C4H8+11.08 ± 0.01C2H4PISergeev, Akopyan, et al., 1973LLK
C5H9+9.88CH3EILossing and Traeger, 1975, 2LLK
C5H9+≤11.06CH3EILossing and Traeger, 1975LLK
C5H9+11.15CH3EIPuttemans, 1974LLK
C5H9+11.07 ± 0.04CH3PISergeev, Akopyan, et al., 1973LLK
C6H11+11.32 ± 0.05HPISergeev, Akopyan, et al., 1973LLK
C6H11+11.66HEIPottie, Harrison, et al., 1961RDSH

De-protonation reactions

C6H11- + Hydrogen cation = Cyclohexane

By formula: C6H11- + H+ = C6H12

Quantity Value Units Method Reference Comment
Δr1750. ± 8.4kJ/molBranPeerboom, Rademaker, et al., 1992gas phase; B
Δr1702.1 ± 3.8kJ/molG+TSBohme, Lee-Ruff, et al., 1972gas phase; B
Quantity Value Units Method Reference Comment
Δr1713. ± 9.2kJ/molH-TSPeerboom, Rademaker, et al., 1992gas phase; B
Δr>1665.2kJ/molIMRBBohme, Lee-Ruff, et al., 1972gas phase; B


Go To: Top, 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.

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, . [all data]

Holmes and Lossing, 1991
Holmes, J.L.; Lossing, F.P., Ionization energies of homologous organic compounds and correlation with molecular size, Org. Mass Spectrom., 1991, 26, 537. [all data]

Arimura and Yoshikawa, 1984
Arimura, M.; Yoshikawa, Y., Ionization efficiency and ionization energy of cyclic compounds by electron impact, Mass Spectrosc. (Tokyo), 1984, 32, 375. [all data]

Sieck and Mautner(Meot-Ner), 1982
Sieck, L.W.; Mautner(Meot-Ner), M., Ionization energies and entropies of cycloalkanes. Kinetics of free energy controlled charge-transfer reactions, J. Phys. Chem., 1982, 86, 3646. [all data]

Lias, 1982
Lias, S.G., Thermochemical information from ion-molecule rate constants, Ion Cyclotron Reson. Spectrom. 1982, 1982, 409. [all data]

Kovac and Klasinc, 1978
Kovac, B.; Klasinc, L., Photoelectron spectroscopy of adamantane and some adamantanones, Croat. Chem. Acta, 1978, 51, 55. [all data]

Bieri, Burger, et al., 1977
Bieri, G.; Burger, F.; Heilbronner, E.; Maier, J.P., Valence ionization enrgies of hydrocarbons, Helv. Chim. Acta, 1977, 60, 2213. [all data]

Lossing and Traeger, 1975
Lossing, F.P.; Traeger, J.C., Stabilization in cyclopentadienyl, cyclopentenyl, and cyclopentyl cations, J. Am. Chem. Soc., 1975, 97, 1579. [all data]

Rang, Paldoia, et al., 1974
Rang, S.; Paldoia, P.; Talvari, A., Ionization potentials of unsaturated hydrocarbons. 2. Mono-substituted cyclopentenes and cyclohexenes, Eesti. NSV Tead. Akad. Toim., 1974, 354. [all data]

Puttemans, 1974
Puttemans, J.P., Ionisation de cycloalcanes (C5 a C12) en spectroscopie photoelectronique et par impact electronique, Ing. Chim. (Brussels), 1974, 56, 64. [all data]

Sergeev, Akopyan, et al., 1973
Sergeev, Yu.L.; Akopyan, M.E.; Vilesov, F.I.; Chizhov, Yu.V., Photoionization processes in gaseous cyclohexane, and chloro- and bromocyclohexane, High Energy Chem., 1973, 7, 369, In original 418. [all data]

Ikuta, Yoshihara, et al., 1973
Ikuta, S.; Yoshihara, K.; Shiokawa, T.; Jinno, M.; Yokoyama, Y.; Ikeda, S., Photoelectron spectroscopy of cyclohexane, cyclopentane, and some related compounds, Chem. Lett., 1973, 1237. [all data]

Raymonda, 1972
Raymonda, J.W., Rydberg states in cyclic alkanes, J. Chem. Phys., 1972, 56, 3912. [all data]

Demeo and Yencha, 1970
Demeo, D.A.; Yencha, A.J., Photoelectron spectra of bicyclic and exocyclic olefins, J. Chem. Phys., 1970, 53, 4536. [all data]

Dewar and Worley, 1969
Dewar, M.J.S.; Worley, S.D., Photoelectron spectra of molecules. I. Ionization potentials of some organic molecules and their interpretation, J. Chem. Phys., 1969, 50, 654. [all data]

Al-Joboury and Turner, 1964
Al-Joboury, M.I.; Turner, D.W., Molecular photoelectron spectroscopy. Part II. A summary of ionization potentials, J. Chem. Soc., 1964, 4434. [all data]

Watanabe, 1957
Watanabe, K., Ionization potentials of some molecules, J. Chem. Phys., 1957, 26, 542. [all data]

Hustrulid, Kusch, et al., 1938
Hustrulid, A.; Kusch, P.; Tate, J.T., The dissociation of benzene (C6H6), pyridine (C5H5N) and cyclohexane (C6H12) by electron impact, Phys. Rev., 1938, 54, 1037. [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Bruckmann and Klessinger, 1973
Bruckmann, P.; Klessinger, M., Photoelektronenspektren organischer verbindungen. III. Photoelektronenspektren acetylensubstituierter kleiner ringe, J. Electron Spectrosc. Relat. Phenom., 1973, 2, 341. [all data]

Rabbih, Selim, et al., 1981
Rabbih, M.A.; Selim, E.T.M.; Fahmey, M.A., Ionization & fragmentation of cyclohexane, Indian J. Pure Appl. Phys., 1981, 19, 962. [all data]

Lossing and Traeger, 1975, 2
Lossing, F.P.; Traeger, J.C., Free radicals by mass spectrometry XLVI. Heats of formation of C5H7 and C5H9 radicals and cations., J. Am. Chem. Soc., 1975, 19, 9. [all data]

Pottie, Harrison, et al., 1961
Pottie, R.F.; Harrison, A.G.; Lossing, F.P., Free radicals by mass spectrometry. XXIV. Ionization potentials of cycloalkyl free radicals and cycloalkanes, J. Am. Chem. Soc., 1961, 83, 3204. [all data]

Peerboom, Rademaker, et al., 1992
Peerboom, R.A.L.; Rademaker, G.J.; Dekoning, L.J.; Nibbering, N.M.M., Stabilization of Cycloalkyl Carbanions in the Gas Phase, Rapid Commun. Mass Spectrom., 1992, 6, 6, 394, . [all data]

Bohme, Lee-Ruff, et al., 1972
Bohme, D.K.; Lee-Ruff, E.; Young, L.B., Acidity order of selected bronsted acids in the gas phase at 300K, J. Am. Chem. Soc., 1972, 94, 5153. [all data]


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