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Bismuth monoxide

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, 1976

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 209Bi16O
F (40941) [748] H 1         F larrow X1 40970 H
missing citation
E 2Sigma? (38550) 769.3 H 6.2        E larrow X1 38588 H
missing citation
D (2Pi)1/2 (32805) (343)   [0.2284] 2 3   [4.5E-7]  [2.229] D larrow X1 R 32631.35 Z
missing citation
C (2Delta)3/2 (30700) (465)   [0.2548] 4 5   [3.06E-7]  [2.1102] C larrow X1 6 R 30587.16 4 Z
missing citation
B 4Sigma1/2- 28738.2 483 5  0.260 7 0.0029  8  2.09 B lrarrow X1 6 R 28633.35 Z
Bridge and Howell, 1954; missing citation; missing citation
A 2Pi1/2 14187.0 508.8 Z 2.78  0.24715 9 0.00167  2.33E-7  2.1426 A lrarrow X1 6 R 14095.6 Z
missing citation
X2 2Pi3/2 (8000)           
X1 2Pi1/2 0 692.4 Z 4.34  0.3034 10 3 0.0022  [2.21E-7]  1.934  


1Fragments only.
2Both high and low rotational levels are predissociated; the e and f levels were only observed for 43.5leqJleq71.5 and 57.5leqJleq81.5, respectively, in this region, the Omega-type doubling [recalculated from Barrow, Gissane, et al., 1967] is well represented by Deltanufe=(+)[0.306-11.09E-6(J+1/2)2](J+1/2).
3Unresolved magnetic hyperfine structure; see Barrow, Gissane, et al., 1967, Atkins, 1967.
4Vibrational numbering uncertain. The single band reported by Barrow, Gissane, et al., 1967 agrees in position with the 1-0 band of a weak system observed by Bridge and Howell, 1954 at about 1480 cm-1 above the B-X bands.
5Very small Omega-type doubling.
6The lines have half-widths of ~ 0.25cm-1 (independent of J), owing to the unresolved magnetic hyperfine splitting of the ground state levels.
7Large Omega-type doubling, Deltanufe(v,J) = pv(J+1/2) - ... where pv ~ +4Bv Barrow, Gissane, et al., 1967. The sign of the splitting cannot be determined from the spectrum but is chosen here to give agreement with theoretical predictions [see Kopp and Hougen, 1967] for a 4Sigma1/2- state. This requires the parities of most rotational levels in figure 4 of Barrow, Gissane, et al., 1967 to be reversed and leads to negative values of Deltanufe in the ground state of BiO, contrary to results for other group V oxides.
8Dv increases from D2 =32.3E-8 to D5 =80.3E-8. [See Barrow, Gissane, et al., 1967.]
9Deltanufe(v=2,...,9) ~(+)0.025(J+1/2) - ...; for more details see Barrow, Gissane, et al., 1967.
10Deltanufe(v=0) = (-)0.187(J+1/2).
11Thermochemical value (mass-spectrom.) 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.

Bridge and Howell, 1954
Bridge, N.K.; Howell, H.G., The absorption spectrum of bismuth oxide, Proc. Phys. Soc. London Sect. A, 1954, 67, 44. [all data]

Barrow, Gissane, et al., 1967
Barrow, R.F.; Gissane, W.J.M.; Richards, D., Magnetic hyperfine interactions int he electronic spectra of diatomic molecules. I. The rotational structure of absorption bands of gaseous BiO, Proc. R. Soc. London A, 1967, 300, 469. [all data]

Atkins, 1967
Atkins, P.W., Magnetic hyperfine interactions in the electronic spectra of diatomic molecules. II. Magnetic interactions in Hund's case (c) and the spectram of BiO, Proc. R. Soc. London A, 1967, 300, 487. [all data]

Kopp and Hougen, 1967
Kopp, I.; Hougen, J.T., Rotational energy levels of 1/2 states and intensities in 1/2-1/2 transitions: applications to some heavier hydrides, Can. J. Phys., 1967, 45, 2581. [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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