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Fluoroimidogen


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 May, 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 14N19F
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Theoretical potential functions and spectroscopic constants for the ground and several excited states O'Hare and Wahl, 1971, Andersen and Ohrn, 1973, Ellis and Banyard, 1974
b 1Sigma+ 18877.05 1197.49 Z 8.64  1.23770 0.01448  5.28E-6  1.29983 b 1 rarrow X 2 V 18905.20 Z
missing citation
a 1Delta [12003.60]    [1.2225] 3   [4.5E-6]  [1.3079] a rarrow X V 11435.16 Z
missing citation
X 3Sigma- 0 1141.37 Z 8.99  1.20568 4 0.01492  5.39E-6  1.31698 5  
Milligan and Jacox, 1964

Notes

1Lifetime 0.16 s, estimated from the rate of attenuation of the green emission in the reaction N + NF2 along a flow tube Clyne and White, 1970.
2Franck-Condon factors Mohamed, Khanna, et al., 1974.
3Spin coupling constants lambda0 = 1.2l5, gamma0 = -0.0048.
4missing note
5Vibration sp. 7
6Estimated by O'Hare and Wahl, 1971 on the basis of spectroscopic and thermochemical data; the ab initio computed value is 3.6 eV.
7Observed in argon and nitrogen matrices, DeltaG(1/2) = 1115.

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.

O'Hare and Wahl, 1971
O'Hare, P.A.G.; Wahl, A.C., Quantum-chemical study of some pnicogen monofluorides, J. Chem. Phys., 1971, 54, 4563. [all data]

Andersen and Ohrn, 1973
Andersen, A.; Ohrn, Y., Configuration interaction studies of NF and NF+, J. Mol. Spectrosc., 1973, 45, 358. [all data]

Ellis and Banyard, 1974
Ellis, D.J.; Banyard, K.E., A calculation of the spectroscopic constants for several states of NF, J. Phys. B:, 1974, 7, 2021. [all data]

Milligan and Jacox, 1964
Milligan, D.E.; Jacox, M.E., Infrared Spectra of NF, NCl, and NBr, J. Chem. Phys., 1964, 40, 9, 2461, https://doi.org/10.1063/1.1725547 . [all data]

Clyne and White, 1970
Clyne, M.A.A.; White, I.F., Electronic energy transfer processes in fluorine-containing radicals: singlet NF, Chem. Phys. Lett., 1970, 6, 465. [all data]

Mohamed, Khanna, et al., 1974
Mohamed, K.A.; Khanna, B.N.; Lal, K.M., Franck-Condon factors & r-centroids for the b1«SIGMA»+ -- X3«SIGMA»- band system of NF, Indian J. Pure Appl. Phys., 1974, 12, 243. [all data]


Notes

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