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:
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 H4N2+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)8.1 ± 0.15eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)853.2kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity822.4kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
8.1 ± 0.15EQMautner(Meot-Ner), Nelsen, et al., 1984LBLHLM
8.93 ± 0.05EIWiberg, Fischer, et al., 1979LLK
8.93PEBodor, Dewar, et al., 1970RDSH
8.8EIMelton, 1966RDSH
8.74 ± 0.06PIAkopyan and Vilesov, 1963RDSH
8.36 ± 0.03PIAkopyan, Vilesov, et al., 1963RDSH
9.0 ± 0.1ElDibeler, Franklin, et al., 1959RDSH
9.56 ± 0.02PIVilesov and Terenin, 1957RDSH
8.98 ± 0.05PEVovna, Vilesov, et al., 1975Vertical value; LLK
10.68PERademacher, 1975Vertical value; LLK
9.90PENelsen and Buschek, 1974Vertical value; LLK
9.91PEOsafune, Katsumata, et al., 1973Vertical value; LLK
10.07PEBarz and Fritz, 1972Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
N2H+14.8 ± 0.3H2+HEIDibeler, Franklin, et al., 1959RDSH
NH2+13.9 ± 0.4NH2EIFoner and Hudson, 1958RDSH
H2N2+10.75 ± 0.082HEIFoner and Hudson, 1978LLK
N2H2+11.9 ± 0.2H2EIDibeler, Franklin, et al., 1959RDSH
N2H2+11.0 ± 0.2H2EIFoner and Hudson, 1958, 2RDSH
H3N2+10.86 ± 0.05HEIWiberg, Fischer, et al., 1979LLK
N2H3+11.3HEIFisher and Heath, 1965RDSH
N2H3+10.6 ± 0.1HPIAkopyan and Vilesov, 1963RDSH
N2H3+11.3 ± 0.1HEIDibeler, Franklin, et al., 1959RDSH
N2H3+11.2 ± 0.1HEIFoner and Hudson, 1958RDSH
N2+16.2 ± 0.12H2EIDibeler, Franklin, et al., 1959RDSH


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]

Mautner(Meot-Ner), Nelsen, et al., 1984
Mautner(Meot-Ner), M.; Nelsen, S.F.; Willi, M.R.; Frigo, T.B., Special effects of an unusually large neutral to radical cation geometry change. Adiabatic ionization energies and proton affinities of alkylhydrazines, J. Am. Chem. Soc., 1984, 106, 7384. [all data]

Wiberg, Fischer, et al., 1979
Wiberg, N.; Fischer, G.; Bachhuber, H., Diazen und andere Distickstoffhydride: Bildungswarmen, Dissoziationsenergien, Auftrittspotentiale, Protonenaffinitaten, Z. Naturforsch. B:, 1979, 34, 1385. [all data]

Bodor, Dewar, et al., 1970
Bodor, N.; Dewar, M.J.S.; Jennings, W.B.; Worley, S.D., Photoelectron spectra of molecules-IV.Ionization potentials and heats of formation of some hydrazines and amines, Tetrahedron, 1970, 26, 4109. [all data]

Melton, 1966
Melton, C.E., Study by mass spectrometry of the decomposition of ammonia by ionizing radiation in a wide-range radiolysis source, J. Chem. Phys., 1966, 45, 4414. [all data]

Akopyan and Vilesov, 1963
Akopyan, M.E.; Vilesov, F.I., Decay of the molecular ions formed in photoionization of hydrazine and some of its alkyl derivatives, Kinetika i Kataliz, 1963, 4, 39, In original 32. [all data]

Akopyan, Vilesov, et al., 1963
Akopyan, M.E.; Vilesov, F.I.; Terenin, A.N., Mass spectrometric investigation of photoionization of molecules and dissociation of excited molecular ions, Izv. Akad. Nauk SSSR, Ser. Fiz., 1963, 27, 1083, In original 1054. [all data]

Dibeler, Franklin, et al., 1959
Dibeler, V.H.; Franklin, J.L.; Reese, R.M., Electron impact studies of hydrazine and the methyl-substituted hydrazines, J. Am. Chem. Soc., 1959, 81, 68. [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]

Vovna, Vilesov, et al., 1975
Vovna, V.I.; Vilesov, F.I.; Lopatin, S.N., Photoelectron spectra of hydrazine and some alkyl derivatives, Opt. Spectrosc., 1975, 38, 143. [all data]

Rademacher, 1975
Rademacher, P., Acyclische Hydrazine, Chem. Ber., 1975, 108, 1548. [all data]

Nelsen and Buschek, 1974
Nelsen, S.F.; Buschek, J.M., Photoelectron spectra of hydrazines. III. Evidence for similar lone pair-lone pair dihedral angles for acyclic hydrazines, J. Am. Chem. Soc., 1974, 96, 2392. [all data]

Osafune, Katsumata, et al., 1973
Osafune, K.; Katsumata, S.; Kimura, K., Photoelectron spectroscopic study of hydrazine, Chem. Phys. Lett., 1973, 19, 369. [all data]

Barz and Fritz, 1972
Barz, P.; Fritz, H.P., Untersuchungen an biochemish ligandensystemen, V. Komplexchemische und physikalisch-chemische untersuchungen am 1,2-dimethylhydrazin, Z. Naturforsch. B:, 1972, 27, 1131. [all data]

Foner and Hudson, 1958
Foner, S.N.; Hudson, R.L., Mass spectrometric detection of triazene and tetrazene and studies of the free radicals NH2, and N2H3, J. Chem. Phys., 1958, 29, 442. [all data]

Foner and Hudson, 1978
Foner, S.N.; Hudson, R.L., On the heat of formation of diimide, J. Chem. Phys., 1978, 68, 3162. [all data]

Foner and Hudson, 1958, 2
Foner, S.N.; Hudson, R.L., Diimide-identification and study by mass spectrometry, J. Chem. Phys., 1958, 28, 719. [all data]

Fisher and Heath, 1965
Fisher, I.P.; Heath, G.A., Dissociation energy of the N-H bond in hydrazine, Nature, 1965, 208, 1199. [all data]


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