Methane, nitro-

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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

Quantity Value Units Method Reference Comment
IE (evaluated)11.08 ± 0.04eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)754.6kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity721.6kJ/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
0.1720 ± 0.0060LPESAdams, Schneider, et al., 2009B
0.260 ± 0.080LPESCompton, Carman Jr., et al., 1996dipole-bound state: 12±3 meV.; B
0.01201N/ALecomte, Carles, et al., 2000Dipole-bound state; B
0.500 ± 0.020ECDChen, Welk, et al., 1999Reanalysis of Chen and Wentworth, 1983; B
0.49 ± 0.11IMREGrimsrud, Caldwell, et al., 1985ΔGea(423 K) = -12.1 kcal/mol; ΔSea (estimated) = +2.0 eu.; B
0.451 ± 0.052ECDChen and Wentworth, 1983B
0.44 ± 0.20NBIECompton, Reinhardt, et al., 1978B
0.960 ± 0.010LPESGoebbert, Pichugin, et al., 2009Stated electron affinity is the Vertical Detachment Energy; B

Ionization energy determinations

IE (eV) Method Reference Comment
11.07PEPasa-Tolic, Klasine, et al., 1990LL
11.1 ± 0.05PILifshitz, Rejwan, et al., 1988LL
10.7PEOgden, Shaw, et al., 1983LBLHLM
11.12PEGilman, Hsieh, et al., 1983LBLHLM
11.05PEKatsumata, Shiromaru, et al., 1982LBLHLM
11.28 ± 0.08EIAllam, Migahed, et al., 1982LBLHLM
11.28PEKimura, Katsumata, et al., 1981LLK
11.1PEAsbrink, Svensson, et al., 1981LLK
11.28 ± 0.08EIAllam, Migahed, et al., 1981LLK
11.07 ± 0.01PERabalais, 1972LLK
11.040 ± 0.017PINicholson, 1970RDSH
11.23 ± 0.01PEDewar, Shanshal, et al., 1969RDSH
11.130 ± 0.006PINicholson, 1965RDSH
11.08 ± 0.03PIWatanabe, Nakayama, et al., 1962RDSH
11.29PEBajic, Humski, et al., 1985Vertical value; LBLHLM
11.47PEKatsumata, Shiromaru, et al., 1982Vertical value; LBLHLM
11.31PEKobayashi, 1978Vertical value; LLK
11.8PERao, 1975Vertical value; LLK
11.29PEKobayashi and Nagakura, 1974Vertical value; LLK
11.31 ± 0.015PEKobayashi and Nagakura, 1972Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+22.83 ± 0.05?EIKandel, 1955RDSH
CH2NO2+11.8 ± 0.1HPILifshitz, Rejwan, et al., 1988LL
CH2NO2+11.97 ± 0.02HEIKandel, 1955RDSH
CH3+13.6NO2EIHaney and Franklin, 1968RDSH
CH3+12.6NO2EITsuda and Hamill, 1966RDSH
CH3NO+11.75 ± 0.05OPILifshitz, Rejwan, et al., 1988LL
CH3NO+11.95OPIPECOGilman, Hsieh, et al., 1983LBLHLM
NO+11.75 ± 0.05CH3OPILifshitz, Rejwan, et al., 1988LL
NO+11.5CH3OPEOgden, Shaw, et al., 1983LBLHLM
NO+11.76CH3OPIPECOGilman, Hsieh, et al., 1983LBLHLM
NO+11.7CH3OPIPECONiwa, Tajima, et al., 1981LLK
NO+11.75 ± 0.01?PINicholson, 1970RDSH
NO2+12.1 ± 0.1CH3PILifshitz, Rejwan, et al., 1988LL
NO2+11.97CH3PEOgden, Shaw, et al., 1983LBLHLM
NO2+12.1CH3PIPECONiwa, Tajima, et al., 1981LLK
NO2+13. ± 0.CH3EICollin, 1959RDSH
O+14.50 ± 0.16?EIKandel, 1955RDSH

De-protonation reactions

CH2NO2- + Hydrogen cation = Methane, nitro-

By formula: CH2NO2- + H+ = CH3NO2

Quantity Value Units Method Reference Comment
Δr1498. ± 21.kJ/molD-EAMetz, Cyr, et al., 1991gas phase; B
Δr1491. ± 9.2kJ/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Δr1495. ± 12.kJ/molG+TSCumming and Kebarle, 1978gas phase; B
Quantity Value Units Method Reference Comment
Δr1463. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Δr1467. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; B
Δr1467. ± 8.4kJ/molIMREMacKay and Bohme, 1978gas phase; EA: < NO2; 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]

Adams, Schneider, et al., 2009
Adams, C.L.; Schneider, H.; Ervin, K.M.; Weber, J.M., Low-energy photoelectron imaging spectroscopy of nitromethane anions: Electron affinity, vibrational features, anisotropies, and the dipole-bound state, J. Chem. Phys., 2009, 130, 7, 074307, . [all data]

Compton, Carman Jr., et al., 1996
Compton, R.N.; Carman Jr.; Desfrancois, C.; Abdoul-Carmine, H.; Schermann, J.P.; Hendricks, J.H., On the binding of Electrons to Nitromethane: Dipole and Valence Bound Anions, J. Chem. Phys., 1996, 105, 9, 3472, . [all data]

Lecomte, Carles, et al., 2000
Lecomte, F.; Carles, S.; Desfrancois, C.; Johnson, M.A., Dipole bound and valence state coupling in argon-solvated nitromethane anions, J. Chem. Phys., 2000, 113, 24, 10973-10977, . [all data]

Chen, Welk, et al., 1999
Chen, E.C.M.; Welk, N.; Chen, E.S.; Wentworth, W.E., Electron affinity, gas-phase acidity, bond dissociation energy, and negative ion states of nitromethane, J. Phys. Chem. A, 1999, 103, 45, 9072-9079, . [all data]

Chen and Wentworth, 1983
Chen, E.C.M.; Wentworth, W.E., Determination of molecular electron affinities using the electron capture detector in the pulse sampling mode at steady state, J. Phys. Chem., 1983, 87, 45. [all data]

Grimsrud, Caldwell, et al., 1985
Grimsrud, E.; Caldwell, G.; Kebarle, P., Electron affinities from electron transfer equilibria: A- + B = A + B-, J. Am. Chem. Soc., 1985, 107, 4627. [all data]

Compton, Reinhardt, et al., 1978
Compton, R.N.; Reinhardt, P.W.; Cooper, C.D., Collisional ionization between alkali atoms and some methane derivatives: Electron affinities for CH3NO2, CF3I, and CF3Br, J. Chem. Phys., 1978, 68, 4360. [all data]

Goebbert, Pichugin, et al., 2009
Goebbert, D.J.; Pichugin, K.; Sanov, A., Low-lying electronic states of CH3NO2 via photoelectron imaging of the nitromethane anion, J. Chem. Phys., 2009, 131, 16, 164308, . [all data]

Pasa-Tolic, Klasine, et al., 1990
Pasa-Tolic, L.; Klasine, L.; McGlynn, S.P., The HeI PE spectrum and electronic structure of nitroethene, Chem. Phys. Lett., 1990, 170, 113. [all data]

Lifshitz, Rejwan, et al., 1988
Lifshitz, C.; Rejwan, M.; Levin, I.; Peres, T., Unimolecular fragmentations of the nitromenthane cation, Int. J. Mass Spectrom. Ion Processes, 1988, 84, 271. [all data]

Ogden, Shaw, et al., 1983
Ogden, I.K.; Shaw, N.; Danby, C.J.; Powis, I., Competing dissociation channels of nitromethane and methyl nitrite ions and the role of electronic and internal modes of excitation, Int. J. Mass Spectrom. Ion Processes, 1983, 54, 41. [all data]

Gilman, Hsieh, et al., 1983
Gilman, J.P.; Hsieh, T.; Meisels, G.G., Competition between isomerization and fragmentation of gaseous ions. II. Nitromethane and methylnitrite ions, J. Chem. Phys., 1983, 78, 1174. [all data]

Katsumata, Shiromaru, et al., 1982
Katsumata, S.; Shiromaru, H.; Mitani, K.; Iwata, S.; Kimura, K., Photoelectron angular distribution and assignments of photoelectron spectra of nitrogen dioxide, nitromethane and nitrobenzene, Chem. Phys., 1982, 69, 423. [all data]

Allam, Migahed, et al., 1982
Allam, S.H.; Migahed, M.D.; El-Khodary, A., Electron impact ionization and dissociation of deuterated and non-deuterated methanol, methyl cyanide, nitromethane and nitrobenzene, Egypt. J. Phys., 1982, 13, 167. [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]

Allam, Migahed, et al., 1981
Allam, S.H.; Migahed, M.D.; El Khodary, A., Electron impact study of nitrobenzene and nitromethane, Int. J. Mass Spectrom. Ion Phys., 1981, 39, 117. [all data]

Rabalais, 1972
Rabalais, J.W., Photoelectron spectroscopic investigation of the electronic structure of nitromethane and nitrobenzene, J. Chem. Phys., 1972, 57, 960. [all data]

Nicholson, 1970
Nicholson, A.J.C., Determination of bond dissociation energies from photoionization efficiency curves in Recent Developments in Mass Spectrometroscopy, ed. K Ogata and T. Hayakawa, Univ. Park Press, Baltimore, MD, 1970, 745. [all data]

Dewar, Shanshal, et al., 1969
Dewar, M.J.S.; Shanshal, M.; Worley, S.D., Calculated and observed ionization potentials gf nitroalkanes and of nitrous and nitric acids and esters. Extension of the MINDO method to nitrogen-oxygen compounds, J. Am. Chem. Soc., 1969, 91, 3590. [all data]

Nicholson, 1965
Nicholson, A.J.C., Photoionization-efficiency curves. II. False and genuine structure, J. Chem. Phys., 1965, 43, 1171. [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]

Bajic, Humski, et al., 1985
Bajic, M.; Humski, K.; Klasinc, L.; Ruscic, B., Substitution effects on electronic structure of thiophene, Z. Naturforsch. B:, 1985, 40, 1214. [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]

Rao, 1975
Rao, C.N.R., Lone-pair ionization bands of chromophores in the photoelectron spectra of organic molecules, Indian J. Chem., 1975, 13, 950. [all data]

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

Kobayashi and Nagakura, 1972
Kobayashi, T.; Nagakura, S., Photoelectron spectra of nitro-compounds, Chem. Lett., 1972, 903. [all data]

Kandel, 1955
Kandel, R.J., Appearance potential studies. II. Nitromethane, J. Chem. Phys., 1955, 23, 84. [all data]

Haney and Franklin, 1968
Haney, M.A.; Franklin, J.L., Correlation of excess energies of electron-impact dissociations with the translational energies of the products, J.Chem. Phys., 1968, 48, 4093. [all data]

Tsuda and Hamill, 1966
Tsuda, S.; Hamill, W.H., Ionization efficiency measurements by the retarding potential difference method, Advan. Mass Spectrom., 1966, 3, 249. [all data]

Niwa, Tajima, et al., 1981
Niwa, Y.; Tajima, S.; Tsuchiya, T., Fragmentation of energy-selected nitromethane ions, Int. J. Mass Spectrom. Ion Processes, 1981, 40, 287. [all data]

Collin, 1959
Collin, J., Ionization and dissociation of molecules by monoenergetic electrons. III. On the existence of a bent excited state of NO2+, J. Chem. Phys., 1959, 30, 1621. [all data]

Metz, Cyr, et al., 1991
Metz, R.B.; Cyr, D.R.; Neumark, D.M., Study of the 2B1 and 2A2 States of CH2NO2 via Ultraviolet Photoelectron Spectroscopy of the CH2NO2- Anion, J. Phys. Chem., 1991, 95, 7, 2900, . [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]

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]

MacKay and Bohme, 1978
MacKay, G.I.; Bohme, D.K., Proton-Transfer Reactions in Nitromethane at 297K, Int. J. Mass Spectrom. Ion Phys., 1978, 26, 4, 327, . [all data]


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