Disodium


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
Δfgas33.956kcal/molReviewChase, 1998Data last reviewed in December, 1983
Quantity Value Units Method Reference Comment
gas,1 bar55.031cal/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 1400.1400. to 2800.2800. to 6000.
A 8.57356222.23530-118.2720
B 0.987445-10.5207055.28989
C 0.7393191.798310-8.050161
D -0.9090110.0720350.382342
E 0.006706-4.515510204.8050
F 31.3732118.38250295.8819
G 65.1238173.5485983.63401
H 33.9555933.9555933.95559
ReferenceChase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in December, 1983 Data last reviewed in December, 1983 Data last reviewed in December, 1983

Reaction 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.

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Na7+ + Disodium = (Na7+ • Disodium)

By formula: Na7+ + Na2 = (Na7+ • Na2)

Quantity Value Units Method Reference Comment
Δr30.2kcal/molPDissBrechignac, Cahuzac, et al., 1989gas phase

Na9+ + Disodium = (Na9+ • Disodium)

By formula: Na9+ + Na2 = (Na9+ • Na2)

Quantity Value Units Method Reference Comment
Δr13.8kcal/molPDissBrechignac, Cahuzac, et al., 1989gas phase

Na11+ + Disodium = (Na11+ • Disodium)

By formula: Na11+ + Na2 = (Na11+ • Na2)

Quantity Value Units Method Reference Comment
Δr19.4kcal/molPDissBrechignac, Cahuzac, et al., 1989gas phase

Na13+ + Disodium = (Na13+ • Disodium)

By formula: Na13+ + Na2 = (Na13+ • Na2)

Quantity Value Units Method Reference Comment
Δr18.7kcal/molPDissBrechignac, Cahuzac, et al., 1989gas phase

Na3+ + Disodium = (Na3+ • Disodium)

By formula: Na3+ + Na2 = (Na3+ • Na2)

Quantity Value Units Method Reference Comment
Δr17.1kcal/molPDissBrechignac, Cahuzac, et al., 1989gas phase

Na5+ + Disodium = (Na5+ • Disodium)

By formula: Na5+ + Na2 = (Na5+ • Na2)

Quantity Value Units Method Reference Comment
Δr21.9kcal/molPDissBrechignac, Cahuzac, et al., 1989gas phase

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
B - John E. Bartmess

Quantity Value Units Method Reference Comment
IE (evaluated)4.892 ± 0.003eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)274.09kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity267.26kcal/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
0.430 ± 0.015LPESMcHugh, Eaton, et al., 1989Vertical Detachment Energy: 0.543±0.010 eV; B

Ionization energy determinations

IE (eV) Method Reference Comment
4.8947 ± 0.0001TEBuhler, 1990LL
4.8951 ± 0.0002PIKappes, Radi, et al., 1985LBLHLM
4.91 ± 0.04PIPeterson, Dao, et al., 1984LBLHLM
4.897 ± 0.006SMartin, Chevaleyre, et al., 1982LBLHLM
4.88898 ± 0.00016LSLeutwyler, Hofmann, et al., 1981LLK
4.934 ± 0.011PIHerrmann, Schumacher, et al., 1978LLK
4.866 ± 0.014LSHerrmann, Schumacher, et al., 1978LLK
4.866 ± 0.014PIHerrmann, Leutwyler, et al., 1978LLK
4.9EIZmbov, Wu, et al., 1977LLK
4.8 ± 0.1EIEmel'yanov, Peredvigina, et al., 1971LLK
4.9 ± 0.1PIRobbins, Leckenby, et al., 1967RDSH
4.90 ± 0.01PIHudson, 1965RDSH
~4.87SBarrow, Travis, et al., 1960RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
Na+5.91 ± 0.09NaPIWagner and Isenor, 1983LBLHLM

References

Go To: Top, Gas phase thermochemistry data, Reaction 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]

Brechignac, Cahuzac, et al., 1989
Brechignac, C.; Cahuzac, P.; Leygnier, J.; Pfalum, R.; Roux, J.P.; Weiner, J., Stability of Alkali Cluster Ions, Z. Phys. D: At. Mol. Clusters, 1989, 12, 1-4, 199, https://doi.org/10.1007/BF01426937 . [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]

McHugh, Eaton, et al., 1989
McHugh, K.M.; Eaton, J.G.; Lee, G.H.; Sarkas, H.W.; Kidder, L.H.; Snodgrass, J.T.; Manaa, M.R.; Bowen, K.H., Photoelectron Spectra of the alkali metal cluster Anions: Na-,n=2-5, K-,n=2-7, Rb-,n=2-3, and Cs-,n=2-3, J. Chem. Phys., 1989, 91, 6, 3792, https://doi.org/10.1063/1.456861 . [all data]

Buhler, 1990
Buhler, B., [Title unavailable], Ph. D. Thesis, Fakultat fur Physik, Universitat Freiburg, 1990. [all data]

Kappes, Radi, et al., 1985
Kappes, M.M.; Radi, P.; Schar, M.; Schumacher, E., Photoionization measurements on dialkali monohalides generated in supersonic nozzle beams, Chem. Phys. Lett., 1985, 113, 243. [all data]

Peterson, Dao, et al., 1984
Peterson, K.I.; Dao, P.D.; Farley, R.W.; Castleman, A.W., Jr., Photoionization of sodium clusters, J. Chem. Phys., 1984, 80, 1780. [all data]

Martin, Chevaleyre, et al., 1982
Martin, S.; Chevaleyre, J.; Valignat, S.; Perrot, J.P.; Broyer, M.; Cabaud, B.; Hoareau, A., Autoionizing Rydberg states of the Na2 molecule, Chem. Phys. Lett., 1982, 87, 235. [all data]

Leutwyler, Hofmann, et al., 1981
Leutwyler, S.; Hofmann, M.; Harri, H.-P.; Schumacher, E., The adiabatic ionization potentials of the alkali dimers Na2, NaK and K2, Chem. Phys. Lett., 1981, 77, 257. [all data]

Herrmann, Schumacher, et al., 1978
Herrmann, A.; Schumacher, E.; Woste, L., Preparation and photoionization potentials of molecules of sodium, potassium and mixed atoms, J. Chem. Phys., 1978, 68, 2327. [all data]

Herrmann, Leutwyler, et al., 1978
Herrmann, A.; Leutwyler, S.; Schumacher, E.; Woste, L., 38. On metal-atom clusters IV. Photoionization thresholds and multiphoton ionization spectra of alkali-metal molecules, Helv. Chim. Acta, 1978, 61, 453. [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]

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]

Robbins, Leckenby, et al., 1967
Robbins, E.J.; Leckenby, R.E.; Willis, P., The ionization potentials of clustered sodium atoms, Advan. Phys., 1967, 16, 739. [all data]

Hudson, 1965
Hudson, R.D., Measurements of the molecular absorption cross section and the photoionization of sodium vapor between 1600 and 3700, J. Chem. Phys., 1965, 43, 1790. [all data]

Barrow, Travis, et al., 1960
Barrow, R.F.; Travis, N.; Wright, C.V., Excited electronic states of lithium and sodium molecules, Nature, 1960, 187, 141. [all data]

Wagner and Isenor, 1983
Wagner, G.; Isenor, N.R., Formation and dissociation of Na2+ by ruby laser radiation, Can. J. Phys., 1983, 61, 40. [all data]


Notes

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