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Iodine anion


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 January, 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 127I2-
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
E (2Pi1/2g) (72100) 1           
Spence, 1974
E (2Pi3/2g) (67300)           
Spence, 1974
X (2Sigmau+) 0           

Notes

1Resonances (due to inverse preionization) in the electron transmission current at 5.78 and 6.38 eV. 4
2From D00(I2), and the electron affinities of I and I2.
3From endoergic charge transfer, weighted average of the values in Chupka, Berkowitz, et al., 1971 and Baeda, 1972.
4The 2Piig excited state is derived from the "grandparent" X 2Piig of I2+ by the addition of a pair of nssigma Rydberg electrons. Weaker resonances at 6.85 and 7.15 eV may be associated with the configuration ...nssigmanpsigma/pi.

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.

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

Baeda, 1972
Baeda, A.P.M., The adiabatic electron affinities of Cl2, Br2, I2, IBr, NO2, and O2, Physica, 1972, 59, 541. [all data]


Notes

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