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Iron dimer


Constants of diatomic molecules

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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: 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

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

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]

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


Notes

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