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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

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 C7H10+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)836.5kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity804.0kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
8.6PEWen, Hitchcock, et al., 1990LL
8.80 ± 0.01EIHolmes and McGillivray, 1971LLK
8.82PEDemeo and Yencha, 1970RDSH
8.81 ± 0.02PIDemeo and El-Sayed, 1970RDSH
8.83PEBodor, Dewar, et al., 1970RDSH
9.0 ± 0.1EIMuller and Herberhold, 1968RDSH
8.95 ± 0.15EISteele, Jennings, et al., 1965RDSH
9.05EIWinstein and Lossing, 1964RDSH
9.2PEWen, Hitchcock, et al., 1990Vertical value; LL
<=8.97PEHouk, Rondan, et al., 1983Vertical value; LBLHLM
8.95PEBarraclough, Bilgic, et al., 1979Vertical value; LLK
8.97PEKobayashi, 1978Vertical value; LLK
8.97PEHentrich, Gunkel, et al., 1974Vertical value; LLK
8.97PEAsmus and Klessinger, 1974Vertical value; LLK
8.97PEHeilbronner and Martin, 1972Vertical value; LLK
8.95PEBischof, Heilbronner, et al., 1971Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C5H6+9.22 ± 0.01C2H4EIHolmes and McGillivray, 1971LLK
C5H6+9.58 ± 0.15?EISteele, Jennings, et al., 1965RDSH
C6H5+13.8 ± 0.3?EISteele, Jennings, et al., 1965RDSH
C6H7+10.46 ± 0.01CH3EIHolmes and McGillivray, 1971LLK
C6H7+11.2 ± 0.15CH3EISteele, Jennings, et al., 1965RDSH
C7H7+13.6 ± 0.3H2+HEISteele, Jennings, et al., 1965RDSH
C7H9+11.0 ± 0.01HEIHolmes and McGillivray, 1971LLK
C7H9+11.5 ± 0.15HEISteele, Jennings, et al., 1965RDSH

De-protonation reactions

norbornenide anion + Hydrogen cation = 2-Norbornene

By formula: C7H9- + H+ = C7H10

Quantity Value Units Method Reference Comment
Deltar1682. ± 13.kJ/molG+TSLee and Squires, 1986gas phase; Between NH3, EtNH2. Assigned as vinylic site by authors.; B
Quantity Value Units Method Reference Comment
Deltar1648. ± 13.kJ/molIMRBLee and Squires, 1986gas phase; Between NH3, EtNH2. Assigned as vinylic site by authors.; 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, https://doi.org/10.1063/1.556018 . [all data]

Wen, Hitchcock, et al., 1990
Wen, A.T.; Hitchcock, A.P.; Werstiuk, N.H.; Nguyen, N.; Leigh, W.J., Studies of electronic excited states of substituted norbornenes by UV absorption, electron energy loss, and HeI photoelectron spectroscopy, Can. J. Chem., 1990, 68, 1967. [all data]

Holmes and McGillivray, 1971
Holmes, J.L.; McGillivray, D., The mass spectra of isomeric hydrocarbons-I: Norbornene and nortricyclene; The mechanisms and energetics of their fragmentations, Org. Mass Spectrom., 1971, 5, 1349. [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]

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]

Bodor, Dewar, et al., 1970
Bodor, N.; Dewar, M.J.S.; Worley, S.D., Photoelectron spectra of molecules. III. Ionization potentials of some cyclic hydrocarbons and their derivatives, and heats of formation and ionization potentials calculated by the MINDO SCF MO method, J. Am. Chem. Soc., 1970, 92, 19. [all data]

Muller and Herberhold, 1968
Muller, J.; Herberhold, M., Massenspektroskopische Untersuchungen an C5H5Mn(CO)3 und C5H5Mn(CO)2 L-Komplexen, J. Organometal. Chem., 1968, 13, 399. [all data]

Steele, Jennings, et al., 1965
Steele, W.C.; Jennings, B.H.; Botyos, G.L.; Dudek, G.O., An electron impact study of norbornenyl and nortricyclyl chlorides, J. Org. Chem., 1965, 30, 2886. [all data]

Winstein and Lossing, 1964
Winstein, S.; Lossing, F.P., On the question of homoconjugation in 1,4,7-cyclononatriene, J. Am. Chem. Soc., 1964, 86, 4485. [all data]

Houk, Rondan, et al., 1983
Houk, K.N.; Rondan, N.G.; Paddon-Row, M.N.; Jefford, C.W.; Huy, P.T.; Burrow, P.D.; Jordan, K.D., Ionization potentials, electron affinities, and molecular orbitals of 2-substituted norbornadienes. Theory of 1,2 and homo-1,4 carbene cycloaddition selectivities, J. Am. Chem. Soc., 1983, 105, 5563. [all data]

Barraclough, Bilgic, et al., 1979
Barraclough, P.; Bilgic, S.; Pedley, J.B.; Rogers, A.J.; Young, D.W., Conjugative and homoconjugative effects in 2-heterobicyclo[3.2.1]octa-3,6-dienes, Tetrahedron, 1979, 35, 99. [all data]

Kobayashi, 1978
Kobayashi, T., A new rule for photoelectron angular distributions of molecules, Phys. Lett. A, 1978, 69, 31. [all data]

Hentrich, Gunkel, et al., 1974
Hentrich, G.; Gunkel, E.; Klessinger, M., Photoelektronenspektren organischer verbindungen. 4. Photoelektronenspektren ungesattigter carbonylverbindungen, J. Mol. Struct., 1974, 21, 231. [all data]

Asmus and Klessinger, 1974
Asmus, P.; Klessinger, M., Photoelectron spectra of organic compounds. VI. Exocyclic methylene compounds, Tetrahedron, 1974, 30, 2477. [all data]

Heilbronner and Martin, 1972
Heilbronner, E.; Martin, H.D., The «pi»-orbital sequence in norbornadiene and related hydrocarbons, Helv. Chim. Acta, 1972, 55, 1490. [all data]

Bischof, Heilbronner, et al., 1971
Bischof, P.; Heilbronner, E.; Prinzbach, H.; Martin, H.D., A photoelectron-spectroscopic investigation of the homoconjugative interaction between «pi»- and Walsh-orbitals in endo- and exo- cyclopropano-norbornene, Helv. Chim. Acta, 1971, 54, 1072. [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]


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