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Iron dimer


Gas phase ion energetics data

Go To: Top, Constants of diatomic molecules, References, Notes

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

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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to Fe2+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
0.9020 ± 0.0080LPESLeopold and Lineberger, 1986B

Ionization energy determinations

IE (eV) Method Reference Comment
6.30 ± 0.01PIRohlfing, Cox, et al., 1984LBLHLM
5.9 ± 0.2EILin and Kant, 1969RDSH

Constants of diatomic molecules

Go To: Top, Gas phase ion energetics 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 March, 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 (56)Fe2
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
C 2           C larrow X 1 
de Vore, Ewing, et al., 1975
B  (218) 3         B larrow X 1 (21095) 4
de Vore, Ewing, et al., 1975
A  (194) 3         A larrow X 1 (18355) 4
de Vore, Ewing, et al., 1975
X 0           

Notes

1In Ar matrices at 10 K.
2Continuous absorption with maximum at 24120 cm-1.
3Long upper state progression.
4Lowest observed level, vibrational numbering unknown.
5Thermochemical value (mass-spectrom.) Lin and Kant, 1969.

References

Go To: Top, Gas phase ion energetics 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.

Leopold and Lineberger, 1986
Leopold, D.G.; Lineberger, W.C., A study of the low-lying electronic states of Fe2 and Co2 by negative ion photoelectron spectroscopy, J. Chem. Phys., 1986, 85, 51. [all data]

Rohlfing, Cox, et al., 1984
Rohlfing, E.A.; Cox, D.M.; Kaldor, A.; Johnson, K.H., Photoionization spectra and electronic structure of small iron clusters, J. Chem. Phys., 1984, 81, 3846. [all data]

Lin and Kant, 1969
Lin, S.-S.; Kant, A., Dissociation energy of Fe, J. Phys. Chem., 1969, 73, 2450. [all data]

de Vore, Ewing, et al., 1975
de Vore, T.C.; Ewing, A.; Franzen, H.F.; Calder, V., The visible absorption spectra of Mn2, Fe2, and Ni2 in argon matrices, Chem. Phys. Lett., 1975, 35, 78. [all data]


Notes

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