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HI+


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 September, 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 H127I+
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 2Sigma+ (28000) 1 2          
X 2Pi1/2 (5400) 1           
X 2Pi3/2 0 [(2170)] 3        (1.62) 3  

Notes

1From the photoelectron spectrum Frost, McDowell, et al., 1967, Lempka, Passmore, et al., 1968.
2Unlike those of HF, HCl, HBr, the A2Sigma photoelectron peak of HI is very broad and without vibrational structure, clearly suggesting that the A 2Sigma+ state of HI+ is strongly predissociated. Lempka, Passmore, et al., 1968 estimate DeltaG(1/2) ~ 1040 Lempka, Passmore, et al., 1968, re ~ 1.90 Lempka, Passmore, et al., 1968.
3Estimated by Lempka, Passmore, et al., 1968 from the constants for HF+, HCl+, HBr+.
4From D00(HI) + I.P.(I) - I.P.(HI).
5From the electron impact appearance potential of Hi++ Dorman and Morrison, 1961.

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.

Frost, McDowell, et al., 1967
Frost, D.C.; McDowell, C.A.; Vroom, D.A., Photoelectron spectra of the halogens and the hydrogen halides, J. Chem. Phys., 1967, 46, 4255. [all data]

Lempka, Passmore, et al., 1968
Lempka, H.J.; Passmore, T.R.; Price, W.C., The photoelectron spectra and ionized states of the halogen acids, Proc. Roy. Soc. (London), 1968, A304, 53. [all data]

Dorman and Morrison, 1961
Dorman, F.H.; Morrison, J.D., Double and triple ionization in molecules induced by electron impact, J. Chem. Phys., 1961, 35, 575. [all data]


Notes

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