Lithium dimer

• Formula: Li₂
• Molecular weight: 13.882
• IUPAC Standard InChI: InChI=1S/2Li Copy

  
• IUPAC Standard InChIKey: SMBQBQBNOXIFSF-UHFFFAOYSA-N Copy
• CAS Registry Number: 14452-59-6
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Constants of diatomic molecules
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Gas phase thermochemistry 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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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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:
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

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, 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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

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]

Dugourd, Rayane, et al., 1992
Dugourd, P.; Rayane, D.; Labastie, P.; Vezin, B.; Chevaleyre, J.; Broyer, M., Measurements of lithium cluster ionization potentials, Chem. Phys. Lett., 1992, 197, 433. [all data]

McGeogh and Schlier, 1983
McGeogh, M.W.; Schlier, R.E., Autoionizing Rydberg states of the Li₂ molecule: Molecular constants for Li₂⁺, Chem. Phys. Lett., 1983, 99, 347. [all data]

Eisel and Demtroder, 1982
Eisel, D.; Demtroder, W., Accurate ionization potential of Li₂ from resonant two-photon ionization, Chem. Phys. Lett., 1982, 88, 481. [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [all data]

Mathur, Rothe, et al., 1978
Mathur, B.P.; Rothe, E.W.; Reck, G.P.; Lightman, A.J., Two-photon ionization of Li₂: isotopic separation and determination of IP(Li₂) and D_e (Li₂⁺), Chem. Phys. Lett., 1978, 56, 336. [all data]

Zmbov, Wu, et al., 1977
Zmbov, K.F.; Wu, C.H.; Ihle, H.R., A mass spectrometric study of heteronuclear diatomic alkali metal molecules. Dissociation energies ionization potentials of NaLi, KLi, NaK, J. Chem. Phys., 1977, 67, 4603. [all data]

Ihle and Wu, 1975
Ihle, H.R.; Wu, C.H., Mass spectrometric determination of the ionization potential and dissociation energy of LiD, J. Chem. Phys., 1975, 63, 1605. [all data]

Emel'yanov, Peredvigina, et al., 1971
Emel'yanov, A.M.; Peredvigina, V.A.; Gorokhov, L.N., Ionization potentials of Li₂ and Na₂ molecules and the dissociation energy of Li₂⁺ and Na₂⁺ ions, Teplofiz. Vysokikh Temperatur, 1971, 9, 190, In original 164. [all data]

Foster, Leckenby, et al., 1969
Foster, P.J.; Leckenby, R.E.; Robbins, E.J., The ionization potentials of clustered alkali metal atoms, J. Phys. B:, 1969, 2, 478. [all data]

Velasco, 1960
Velasco, R., Espectro ultravioleta de la molecula Li₂, An. R. Soc. Esp. Fis. Quim., 1960, 175. [all data]

Notes

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• Symbols used in this document:
  

  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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