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Se2 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-41. ± 11.kJ/molR-EASnodgrass, Coe, et al., 1989 

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 July, 1977

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 80Se2-
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
For the following states the constants for Se2- ions dissolved in KI crystals, from fluorescence and absorption spectra studied at 2K Ikezawa and Rolfe, 1973 Vella and Rolfe, 1974.
A (2Piu) (16173) 216.7 0.615        A lrarrow X 16192 1
Rolfe, 1968; Ikezawa and Rolfe, 1973; Vella and Rolfe, 1974
(16173) 216.7 0.615        A lrarrow X 16040
Rolfe, 1968; Ikezawa and Rolfe, 1973; Vella and Rolfe, 1974
X (2Pig) 0 330.3 0.86       2  
Holzer, Murphy, et al., 1969
EPR sp. 3
Vannotti and Morton, 1967

Notes

1Splitting due to the crystal field, not spin-orbit coupling.
2Raman sp. 3
3In NaI and KI crystals.

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.

Snodgrass, Coe, et al., 1989
Snodgrass, J.T.; Coe, J.V.; McHugh, K.M.; Freidhoff, C.B.; Bowen, K.H., Photoelectron Spectroscopy of the Selenium and Tellurium Containing Negative Ions: SeO2-, Se2- and Te2-, J. Phys. Chem., 1989, 93, 4, 1249, https://doi.org/10.1021/j100341a016 . [all data]

Ikezawa and Rolfe, 1973
Ikezawa, M.; Rolfe, J., Zero-phonon transitions in O2-, S2-, and Se2-, and SeS- molecules dissolved in alkali halide crystals, J. Chem. Phys., 1973, 58, 2024. [all data]

Vella and Rolfe, 1974
Vella, G.J.; Rolfe, J., Zero-phonon absorption transitions in S2- and Se2- molecules dissolved in potassium iodide crystals, J. Chem. Phys., 1974, 61, 41. [all data]

Rolfe, 1968
Rolfe, J., Emission spectra of S2-, Se2-, and SeS- ions in KI crystals, J. Chem. Phys., 1968, 49, 4193. [all data]

Holzer, Murphy, et al., 1969
Holzer, W.; Murphy, W.F.; Bernstein, H.J., Raman spectra of negative molecular ions doped in alkali halide crystals, J. Mol. Spectrosc., 1969, 32, 13. [all data]

Vannotti and Morton, 1967
Vannotti, L.E.; Morton, J.R., Paramagnetic resonance spectra of Se2- and SSe- in the alkali iodides, J. Chem. Phys., 1967, 47, 4210. [all data]


Notes

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