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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

Symbols used in the table of constants
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 209Bi(80)Se
D 44425 316 H 2.0        D larrow X V 44450 H
Sharma, 1954
C 35618 304 H 2.0        C larrow X V 35637 H
Sharma, 1954
B 20411 169.4 H 0.8        B larrow X R 20363 H
Yamdagni, 1970
A 1/2 leq13235.7 geq190.9 1 H 0.595 1        A larrow X 2 R leq13198.3 H
Barrow, Stobart, et al., 1967
X 1/2 0 [264.8] 1 H 0.4         


1Constants for Bi80Se.
2Broad lines on account of unresolved nuclear magnetic hyperfine structure.
3Thermochemical value (mass-spectrom.) Porter and Spencer, 1960, Uy and Drowart, 1969.


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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Sharma, 1954
Sharma, C.B., The absorption spectrum of bismuth selenide and bismuth telluride in the region 2900-2200 Å, Proc. Phys. Soc. London Sect. A, 1954, 67, 935. [all data]

Yamdagni, 1970
Yamdagni, R., A new band system of BiSe molecule in the visible region, Indian J. Pure Appl. Phys., 1970, 8, 51. [all data]

Barrow, Stobart, et al., 1967
Barrow, R.F.; Stobart, O.V.; Vaughan, H., Absorption bands of gaseous BiS and BiSe, Proc. Phys. Soc. London, 1967, 90, 555. [all data]

Porter and Spencer, 1960
Porter, R.F.; Spencer, C.W., Stabilities of the gaseous molecules, BiSe, BiTe, and SbTe, J. Chem. Phys., 1960, 32, 943. [all data]

Uy and Drowart, 1969
Uy, O.M.; Drowart, J., Mass spectrometric determination of the dissociation energies of the molecules BiO, BiS, BiSe and BiTe, J. Chem. Soc. Faraday Trans., 1969, 65, 3221. [all data]


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