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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
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 CH3NO+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)10.16 ± 0.06eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)822.2kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity791.2kJ/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Reference Comment
0.0167Desfrancois, Periquet, et al., 1999B

Ionization energy determinations

IE (eV) Method Reference Comment
10.15PEKimura, Katsumata, et al., 1981LLK
10.0PEAsbrink, Svensson, et al., 1981LLK
10.50 ± 0.05EIBaldwin, Loudon, et al., 1977LLK
10.13PEBrundle, Turner, et al., 1969RDSH
10.25 ± 0.02PIWatanabe, Nakayama, et al., 1962RDSH
10.16 ± 0.03PIVilesov, 1960RDSH
10.24SHunt and Simpson, 1953RDSH
9.95PEBallard, Jones, et al., 1987Vertical value; LBLHLM
10.15PEKimura, Katsumata, et al., 1981Vertical value; LLK
10.3PEHenriksen, Isaksson, et al., 1981Vertical value; LLK
10.4PEAsbrink, Svensson, et al., 1981Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CHO+13.70?EILoudon and Webb, 1977LLK
CH2NO+12.00?EILoudon and Webb, 1977LLK

De-protonation reactions

CH2NO- + Hydrogen cation = Formamide

By formula: CH2NO- + H+ = CH3NO

Quantity Value Units Method Reference Comment
Deltar1505. ± 8.8kJ/molG+TSTaft, 1987gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar1476. ± 8.4kJ/molIMRETaft, 1987gas phase; value altered from reference due to change in acidity scale; 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]

Desfrancois, Periquet, et al., 1999
Desfrancois, C.; Periquet, V.; Carles, S.; Schermann, J.P.; Smith, D.M.A.; Adamowicz, L., Experimental and ab initio theoretical studies of electron binding to formamide, N-methylformamide, and N,N-dimethylformamide., J. Chem. Phys., 1999, 110, 9, 4309-4314, https://doi.org/10.1063/1.478353 . [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]

Asbrink, Svensson, et al., 1981
Asbrink, L.; Svensson, A.; Von Niessen, W.; Bieri, G., 30.4 nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1981, 24, 293. [all data]

Baldwin, Loudon, et al., 1977
Baldwin, M.A.; Loudon, A.G.; Webb, K.S.; Cardnell, P.C., Charge location and fragmentation under electron impact. V-The ionization potentials of (methylated) phosphoramides, guanidines, formamides, acetamides, ureas and thioureas, Org. Mass Spectrom., 1977, 12, 279. [all data]

Brundle, Turner, et al., 1969
Brundle, C.R.; Turner, D.W.; Robin, M.B.; Basch, H., Photoelectron spectroscopy of simple amides and carboxylic acids, Chem. Phys. Lett., 1969, 3, 292. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Vilesov, 1960
Vilesov, F.I., The photoionization of vapors of compounds whose molecules contain carbonyl groups, Dokl. Phys. Chem., 1960, 132, 521, In original 1332. [all data]

Hunt and Simpson, 1953
Hunt, H.D.; Simpson, W.T., Spectra of simple amides in the vacuum ultraviolet, J. Am. Chem. Soc., 1953, 75, 4540. [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]

Henriksen, Isaksson, et al., 1981
Henriksen, L.; Isaksson, R.; Liljefors, T.; Sandstrom, J., Ultraviolet absorption and photoelectron spectra of some cyclic and open-chain mono- and dithiooxamides, Acta Chem. Scand., Ser. B, 1981, 35, 489. [all data]

Loudon and Webb, 1977
Loudon, A.G.; Webb, K.S., The nature of the [C2H6N]+ and [CH4N]+ ions formed by electron impact on methylated formamides, acetamides, ureas, thioureas and hexamethylphosphoramide, Org. Mass Spectrom., 1977, 12, 283. [all data]

Taft, 1987
Taft, R.W., The Nature and Analysis of Substitutent Electronic Effects, Personal communication. See also Prog. Phys. Org. Chem., 1987, 16, 1. [all data]


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