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fluorine anion


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.

Data compiled by: John E. Bartmess

Quantity Value Units Method Reference Comment
Deltafgas-291. ± 6.7kJ/molTherWenthold and Squires, 1995EA fixed at 0K value, not 298K of heat of formation

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1976

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 19F2-
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
F (120490) 1210 1 60         
Spence, 1974
E (2Pig) (115300) 1050 1          
Spence, 1974
X 2Sigmau+ 0 (510) 2   (0.50) 2     (1.88) 2  

Notes

1Two progressions of resonances in the electron transmission current starting at 11.25 and 11.90 eV. They indicate the existence of doubly excited (preionizing) states of F2- having the F 1Pig and f 3Pig Rydberg states of F2 as parent states and X 2Pig of F2+ as grandparent.
2Theoretical values from MO-SCF calculations Gilbert and Wahl, 1971, De= 1.66 eV. Multiconfiguration valence bond calculations Copsey, Murrell, et al., 1971 give we= 293, wexe= 1, Be= 0.425, re= 2.04 , De= 1.06 eV. See also Howard and Andrews, 1973 (matrix Raman spectra).
3From D00(F2) and the electron affinities of F2 (3.08 eV) and F (3.399 eV).
4From endoergic charge transfer reactions Chupka, Berkowitz, et al., 1971.

References

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study, J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034 . [all data]

Spence, 1974
Spence, D., Systematics of Feshbach resonances in the molecular halogens, Phys. Rev. A: Gen. Phys., 1974, 10, 1045. [all data]

Gilbert and Wahl, 1971
Gilbert, T.L.; Wahl, A.C., Single-configuration wavefunctions and potential curves for low-lying states of He2+, Ne2+, Ar2+, F2-, Cl2-, and the ground state of Cl2, J. Chem. Phys., 1971, 55, 5247. [all data]

Copsey, Murrell, et al., 1971
Copsey, D.N.; Murrell, J.N.; Stamper, J.G., The dissociation energy of F- and the stability of alkali perfluorides, Mol. Phys., 1971, 21, 2, 193-207. [all data]

Howard and Andrews, 1973
Howard, W.F., Jr.; Andrews, L., Matrix Raman spectrum of the fluorine molecular anion, F2-, J. Am. Chem. Soc., 1973, 95, 9, 3045-3046. [all data]

Chupka, Berkowitz, et al., 1971
Chupka, W.A.; Berkowitz, J.; Gutman, D., Electron Affinities of Halogen Diatomic Molecules as Determined by Endoergic Charge Exchange, J. Chem. Phys., 1971, 55, 6, 2724, https://doi.org/10.1063/1.1676487 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References