niobium nitride

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 October, 1975

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 93Nb14N
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A 3Φ 2     [0.4951] 1   [3.8E-7] 1  [1.6727] 3Φ4 → 3Δ3 R 16859.91 HQ
A 3Φ           3Φ3 → 3Δ2 R 16542.89 HQ
↳Dunn and Rao, 1969
           A 3Φ2 → 3Δ1 R 16144.57 HQ
(X) 3Δ  [(1002.5)] 3   [0.5010] 1   [3.5E-7] 1  [1.6628]  

Notes

1Constants for the F2 component. Large nuclear hyperfine structure in 3Δ1 and 3Δ3, b ~0.196 cm-1 Femenias, Athenour, et al., 1974. A smaller effect was also observed in the excited 3Φ state Femenias, Athenour, et al., 1974.
20-0 sequence only.
3IR spectrum of Nb14N in Ar matrix at 14 K Green, Korfmacher, et al., 1973. Identity with the lower state of the gas phase spectrum not certain.

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.

Dunn and Rao, 1969
Dunn, T.M.; Rao, K.M., Hyperfine splittings in the optical spectrum of NbO+, Nature (London), 1969, 222, 266. [all data]

Femenias, Athenour, et al., 1974
Femenias, J.L.; Athenour, C.; Stringat, R., Theoretical calculations of relative intensities in hyperfine diatomic transitions, Can. J. Phys., 1974, 52, 361. [all data]

Green, Korfmacher, et al., 1973
Green, D.W.; Korfmacher, W.; Gruen, D.M., Infrared absorption spectra of isotopic NbN and NbO isolated in an Ar matrix, J. Chem. Phys., 1973, 58, 404. [all data]

Notes

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