Lithium dimer


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.

Quantity Value Units Method Reference Comment
Δfgas51.601kcal/molReviewChase, 1998Data last reviewed in December, 1983
Quantity Value Units Method Reference Comment
gas,1 bar47.087cal/mol*KReviewChase, 1998Data last reviewed in December, 1983

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 2600.2600. to 6000.
A 6.834370-125.3640
B 5.74151160.65349
C -4.139272-9.075091
D 0.8322840.439550
E 0.041313201.8270
F 49.48081318.6131
G 54.0549071.51080
H 51.6014151.60141
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1983 Data last reviewed in December, 1983

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

Quantity Value Units Method Reference Comment
IE (evaluated)5.1127 ± 0.0003eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)277.7kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity270.82kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
4.73 ± 0.05PIDugourd, Rayane, et al., 1992LL
5.1127 ± 0.0003SMcGeogh and Schlier, 1983LBLHLM
5.14PIEisel and Demtroder, 1982LBLHLM
5.0 ± 0.3EIN/ALLK
5.00EVALHuber and Herzberg, 1979LLK
5.174 ± 0.013PIMathur, Rothe, et al., 1978LLK
5.0EIZmbov, Wu, et al., 1977LLK
4.9 ± 0.1EIN/ALLK
4.9 ± 0.1EIIhle and Wu, 1975LLK
4.9 ± 0.1EIEmel'yanov, Peredvigina, et al., 1971LLK
5.2 ± 0.1PIFoster, Leckenby, et al., 1969RDSH
5.0 ± 0.1SVelasco, 1960RDSH

References

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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 De (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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