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:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Quantity Value Units Method Reference Comment
IE (evaluated)7.53 ± 0.10eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)981.8kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity951.kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
7.47 ± 0.04PEMathis and Compton, 1996LL
7.53 ± 0.10LSMathis and Compton, 1996LL
7.3PEAue and Bowers, 1979LLK
7.1 ± 0.1PEAue, Webb, et al., 1976LLK
7.20 ± 0.09PEAue, Webb, et al., 1975LLK
7.84PEAl-Joboury and Turner, 1964RDSH
7.50 ± 0.02PIWatanabe and Mottl, 1957RDSH
8.03PEZverev and Titova, 1996Vertical value; LL
8.24 ± 0.04PEMathis and Compton, 1996Vertical value; LL
8.08PEUtsunomiya, Kobayashi, et al., 1976Vertical value; LLK
8.19 ± 0.05PELeavell, Steichen, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CH3+16.7(C2H5)2NCHEISenSharma and Franklin, 1973LLK
C4H10N+13.14C2H5EIPlotnikov, Bogolyubov, et al., 1969RDSH
C5H12N+11.48CH3EIPlotnikov, Bogolyubov, et al., 1969RDSH


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]

Mathis and Compton, 1996
Mathis, J.E.; Compton, R.N., Single and multiple photon ionization of triethylamine, J. Chem. Phys., 1996, 104, 8341. [all data]

Aue and Bowers, 1979
Aue, D.H.; Bowers, M.T., Chapter 9. Stabilities of positive ions from equilibrium gas phase basicity measurements in Ions Chemistry,, ed. M.T. Bowers, 1979. [all data]

Aue, Webb, et al., 1976
Aue, D.H.; Webb, H.M.; Bowers, M.T., Quantitative proton affinities, ionization potentials, and hydrogen affinities of alkylamines, J. Am. Chem. Soc., 1976, 98, 311. [all data]

Aue, Webb, et al., 1975
Aue, D.H.; Webb, H.M.; Bowers, M.T., Photoelectron spectrum and gas-phase basicity of manxine. Evidence for a planar bridgehead nitrogen, J. Am. Chem. Soc., 1975, 97, 4136. [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 and Mottl, 1957
Watanabe, K.; Mottl, J.R., Ionization potentials of ammonia and some amines, J. Chem. Phys., 1957, 26, 1773. [all data]

Zverev and Titova, 1996
Zverev, V.V.; Titova, Z.S., Theoretical and experimental investigation of stereoelectronic interactions in H-complexes of sulfenamide derivatives, Izv. Akad. Nauk Ser. Khim., 1996, 2894. [all data]

Utsunomiya, Kobayashi, et al., 1976
Utsunomiya, C.; Kobayashi, T.; Nagakura, S., Photoelectron spectra of electron donor-acceptor complexes between bromine and alkylamines, Chem. Phys. Lett., 1976, 39, 245. [all data]

Leavell, Steichen, et al., 1973
Leavell, S.; Steichen, J.; Franklin, J.L., Photoelectron spectra of intramolecularly hydrogen bonded compounds, J. Chem. Phys., 1973, 59, 4343. [all data]

SenSharma and Franklin, 1973
SenSharma, D.K.; Franklin, J.L., Heat of formation of free radicals by mass spectrometry, J. Am. Chem. Soc., 1973, 95, 6562. [all data]

Plotnikov, Bogolyubov, et al., 1969
Plotnikov, V.F.; Bogolyubov, G.M.; Maretina, I.A.; Petrov, A.A., Organic derivatives of elements of Groups V and VI. V. Mass spectra of 1-buten-3-ynylamines, Zh. Org. Khim., 1969, 5, 1137, In original 1157. [all data]


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