Home Symbol which looks like a small house Up Solid circle with an upward pointer in it


Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Gas phase ion energetics data

Go To: Top, References, Notes

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 C6H6O+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)8.49 ± 0.02eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)817.3kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity786.3kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
8.508 ± 0.001PILipert and Colson, 1990LL
8.506 ± 0.001PIFuke, Yoshiuchi, et al., 1984LBLHLM
8.49PEFuke, Yoshiuchi, et al., 1984LBLHLM
8. ± 0.PIPECOFraser-Monteiro, Fraser-Monteiro, et al., 1984LBLHLM
~8.21PEKlasinc, Kovac, et al., 1983LBLHLM
8.55PEBehan, Johnstone, et al., 1976LLK
8.47 ± 0.02PEMaier and Turner, 1973LLK
9.1 ± 0.1EIHenion and Kingston, 1973LLK
8.37PEDebies and Rabalais, 1973LLK
8.50EICooks, Bertrand, et al., 1973LLK
8.69EIJohnstone, Mellon, et al., 1971LLK
8.48 ± 0.05PEEland, 1969RDSH
8.52PEDewar and Worley, 1969RDSH
8.50 ± 0.01PIWatanabe, 1957RDSH
8.52 ± 0.02PIVilesov and Terenin, 1957RDSH
8.75PEBallard, Jones, et al., 1987Vertical value; LBLHLM
8.61PEKlasinc, Kovac, et al., 1983Vertical value; LBLHLM
8.70PEKimura, Katsumata, et al., 1981Vertical value; LLK
8.56PEPalmer, Moyes, et al., 1979Vertical value; LLK
8.69PEKobayashi, 1978Vertical value; LLK
8.73PEKobayashi and Nagakura, 1974Vertical value; LLK
8.67PEDewar, Ernstbrunner, et al., 1974Vertical value; LLK
8.56PEDebies and Rabalais, 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C5H5+12.96 ± 0.10CO+HDERFraser-Monteiro, Fraser-Monteiro, et al., 1984LBLHLM
C5H5+14.2 ± 0.2CO+HEITajima and Tsuchiya, 1973LLK
C5H5+14.25CO+HEIOccolowitz and White, 1968RDSH
C5H6+11.4 ± 0.1COTRPILifshitz and Malinovich, 1984LBLHLM
C5H6+12.5 ± 0.1COEIHenion and Kingston, 1973LLK
C5H6+11.67COEIHowe and Williams, 1969RDSH
C5H6+[c-C5H6]11.59 ± 0.10COPIPECOFraser-Monteiro, Fraser-Monteiro, et al., 1984T = 0K; LBLHLM

De-protonation reactions

phenoxide anion + Hydrogen cation = Phenol

By formula: C6H5O- + H+ = C6H6O

Quantity Value Units Method Reference Comment
Deltar1462. ± 10.kJ/molAVGN/AAverage of 6 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Deltar1432. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; Shiner, Vorner, et al., 1986: tautomer acidities «DELTA»Hacid(ortho) = 343.9±3.1 kcal, para = 340.1±2 kcal. However, Capponi, Gut, et al., 1999 based on aq. soln. results, imply 18 and 14 kcal/mol difference.; value altered from reference due to change in acidity scale; B
Deltar1426. ± 7.9kJ/molCIDCAngel and Ervin, 2004gas phase; B
Deltar1437. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; B
Deltar>1429. ± 7.5kJ/molH-TSRichardson, Stephenson, et al., 1975gas 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, https://doi.org/10.1063/1.556018 . [all data]

Lipert and Colson, 1990
Lipert, R.J.; Colson, S.D., Accurate ionization potentials of phenol and phenol-(H2O) from the electric field dependence of the pump-probe photoionization threshold, J. Chem. Phys., 1990, 92, 3240. [all data]

Fuke, Yoshiuchi, et al., 1984
Fuke, K.; Yoshiuchi, H.; Kaya, K.; Achiba, Y.; Sato, K.; Kimura, K., Multiphoton ionization photoelectron spectroscopy and two-color multiphoton ionization threshold spectroscopy on the hydrogen bonded phenol and 7-azaindole in a supersonic jet, Chem. Phys. Lett., 1984, 108, 179. [all data]

Fraser-Monteiro, Fraser-Monteiro, et al., 1984
Fraser-Monteiro, M.L.; Fraser-Monteiro, L.; de Wit, J.; Baer, T., Dissociation dynamics of energy-selected phenol ions, J. Phys. Chem., 1984, 88, 3622. [all data]

Klasinc, Kovac, et al., 1983
Klasinc, L.; Kovac, B.; Gusten, H., Photoelectron spectra of acenes. Electronic structure and substituent effects, Pure Appl. Chem., 1983, 55, 289. [all data]

Behan, Johnstone, et al., 1976
Behan, J.M.; Johnstone, R.A.W.; Bentley, T.W., An evaluation of empirical methods for calculating the ionization potentials of substituted benzenes, Org. Mass Spectrom., 1976, 11, 207. [all data]

Maier and Turner, 1973
Maier, J.P.; Turner, D.W., Steric inhibition of resonance studied by molecular photoelectron spectroscopy Part 3. Anilines, Phenols and Related Compounds, J. Chem. Soc. Faraday Trans. 2, 1973, 69, 521. [all data]

Henion and Kingston, 1973
Henion, J.D.; Kingston, D.G.I., Mass spectrometry of organic compounds. VII. Energetics of substituent isomerization in diphenyl sulfide and diphenyl ether, J. Am. Chem. Soc., 1973, 95, 8358. [all data]

Debies and Rabalais, 1973
Debies, T.P.; Rabalais, J.W., Photoelectron spectra of substituted benzenes. II. Seven valence electron substituents, J. Electron Spectrosc. Relat. Phenom., 1973, 1, 355. [all data]

Cooks, Bertrand, et al., 1973
Cooks, R.G.; Bertrand, M.; Beynon, J.H.; Rennekamp, M.E.; Setser, D.W., Energy partitioning data as an ion structure probe. Substituted anisoles, J. Am. Chem. Soc., 1973, 95, 1732. [all data]

Johnstone, Mellon, et al., 1971
Johnstone, R.A.W.; Mellon, F.A.; Ward, S.D., On-line computer methods used in conjunction with the measurement of ionization appearance potentials, Adv. Mass Spectrom., 1971, 5, 334. [all data]

Eland, 1969
Eland, J.H.D., Photoelectron spectra of conjugated hydrocarbons and heteromolecules, Intern. J. Mass Spectrom. Ion Phys., 1969, 2, 471. [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]

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

Vilesov and Terenin, 1957
Vilesov, F.I.; Terenin, A.N., The photoionization of the vapors of certain organic compounds, Dokl. Akad. Nauk SSSR, 1957, 115, 744, In original 539. [all data]

Ballard, Jones, et al., 1987
Ballard, R.E.; Jones, J.; Read, D.; Inchley, A.; Cranmer, M., He(I) photoelectron studies of liquids and gases, Chem. Phys. Lett., 1987, 137, 125. [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]

Palmer, Moyes, et al., 1979
Palmer, M.H.; Moyes, W.; Speirs, M.; Ridyard, J.N.A., The electronic structure of substituted benzenes; ab initio calculations and photoelectron spectra for phenol, the methyl- and fluoro-derivatives, and the dihydroxybenzenes, J. Mol. Struct., 1979, 52, 293. [all data]

Kobayashi, 1978
Kobayashi, T., A simple general tendency in photoelectron angular distributions of some monosubstituted benzenes, Phys. Lett., 1978, 69, 105. [all data]

Kobayashi and Nagakura, 1974
Kobayashi, T.; Nagakura, S., Photoelectron spectra of substituted benzenes, Bull. Chem. Soc. Jpn., 1974, 47, 2563. [all data]

Dewar, Ernstbrunner, et al., 1974
Dewar, P.S.; Ernstbrunner, E.; Gilmore, J.R.; Godfrey, M.; Mellor, J.M., Conformational analysis of alkyl aryl ethers and alkyl aryl sulphides by photoelectron spectroscopy, Tetrahedron, 1974, 30, 2455. [all data]

Tajima and Tsuchiya, 1973
Tajima, S.; Tsuchiya, T., Energetics consideration of C5H5+ ions produced from various precursors by electron impact, Bull. Chem. Soc. Jpn., 1973, 46, 3291. [all data]

Occolowitz and White, 1968
Occolowitz, J.L.; White, G.L., Energetic considerations in the assignment of some fragment ion structures, Australian J. Chem., 1968, 21, 997. [all data]

Lifshitz and Malinovich, 1984
Lifshitz, C.; Malinovich, Y., Time resolved photoionization mass spectrometry in the millisecond range, Int. J. Mass Spectrom. Ion Processes, 1984, 60, 99. [all data]

Howe and Williams, 1969
Howe, I.; Williams, D.H., Calculation and qualitative predictions of mass spectra. Mono- and paradisubstituted benzenes, J. Am. Chem. Soc., 1969, 91, 7137. [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Shiner, Vorner, et al., 1986
Shiner, C.S.; Vorner, P.E.; Kass, S.R., Gas phase acidities and heats of formation of 2,4- and 2,5- cyclohexadien-1-one, the keto tautomers of phenol, J. Am. Chem. Soc., 1986, 108, 5699. [all data]

Capponi, Gut, et al., 1999
Capponi, M.; Gut, I.G.; Hellrung, B.; Persy, G.; Wirz, J., Ketonization equilibria of phenol in aqueous solution, Can. J. Chem., 1999, 77, 5-6, 605-613, https://doi.org/10.1139/v99-048 . [all data]

Angel and Ervin, 2004
Angel, L.A.; Ervin, K.M., Competitive threshold collision-induced dissociation: Gas-phase acidity and O-H bond dissociation enthalpy of phenol, J. Phys. Chem. A, 2004, 108, 40, 8346-8352, https://doi.org/10.1021/jp0474529 . [all data]

Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P., Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A), Can. J. Chem., 1978, 56, 1. [all data]

Richardson, Stephenson, et al., 1975
Richardson, J.H.; Stephenson, L.M.; Brauman, J.I., Photodetachment of electrons from phenoxides and thiophenoxide, J. Am. Chem. Soc., 1975, 97, 2967. [all data]


Go To: Top, Gas phase ion energetics data, References