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Cerium 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 December, 1974

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 (140)Ce16O
Large number of bands in the region 11000 - 29000 cm-1 Gatterer, Junkes, et al., 1957*. Tentative assignments by Ames and Barrow, 1967 Rosen, 1970, revising earlier assignments in Watson, 1938 Gatterer, Junkes, et al., 1957.
D1           D1 lrarrow X1 R 21379.1 HQ
Ames and Barrow, 1967; Rosen, 1970
F2  (772)   [0.35290]   [2.95E-07]  [1.82426] F2 lrarrow X2 R 20834.21 Z
Ames and Barrow, 1967; Rosen, 1970; Watson, 1938
D3           D3 lrarrow X3 R 20516.1 HQ
Rosen, 1970; Watson, 1938
C1  (798)   [0.34984]   [2.69E-07]  [1.832222] C1 lrarrow X1 R 20273.84 Z
Ames and Barrow, 1967; Rosen, 1970
A4           A4 lrarrow X4 R 19871.7 HQ
Rosen, 1970
C3           C3 lrarrow X3 R 16356.9 HR
Rosen, 1970
G 1Pi           G lrarrow Y1 R 15035.40 HQ
Rosen, 1970
B2  (771)   [0.34705]   [2.81E-07]  [1.83958] B2 lrarrow X2 R 13804.01 Z
Ames and Barrow, 1967; Rosen, 1970; Watson, 1938
A2           A2 lrarrow X2 R 12687.91 HQ
Rosen, 1970; Watson, 1938
A1  (749)   [0.34672]   [2.97E-07]  [1.84045] A1 lrarrow X1 R 12595.75 Z
Ames and Barrow, 1967; Rosen, 1970
A3           A3 lrarrow X3 V 12162.20 HQ
Rosen, 1970
Y4 (3Delta3) 1  (886)   [0.35065]   [0.00000023]  [1.8301]  
Y3 (3Delta2) 1  (509)   [0.3614]   [0.00000073]  [1.8027]  
Y2 (3Delta1) 1  (884)   [0.35214]   [0.000000245]  [1.82623]  
Y1 1Sigma(+) 1  (850)   [0.35790]   [0.000000254]  [1.81148]  
X4 (1Phi3) 1 x2 + 2065 2 (818)   0.35710 0.00108  [0.000000271]  1.81350  
X3 3Phi4 1  (932)   0.35377 0.00114  [0.000000203]  1.82202  
X2 3Phi3 1 x2 [822.76] (Z) (3.09)  0.35779 0.00179  [0.000000269]  1.81175  
X1 3Pi2 1  (862)   [0.35452]   [2.40E-07]  1.82009  


1These states give rise to absorption bands at a temperature of 2173 K Rosen, 1970. No details given for transitions from Y2, Y3, Y4.
2X4(v=0) is at 2060.25 cm-1 above X2(v=0). All other separations are unknown [ Rosen, 1970, no details].
3Thermochemical value (mass-spectrom.) Walsh, Dever, et al., 1961, Ames, Walsh, et al., 1967, Coppens, Smoes, et al., 1967, Ackermann and Rauh, 1974.


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

Gatterer, Junkes, et al., 1957
Gatterer, A.; Junkes, J.; Salpeter, E.W., Molecular spectra of metallic oxides, Specola Vaticana, Citta del Vaticano, 1957, 0. [all data]

Ames and Barrow, 1967
Ames, L.L.; Barrow, R.F., Rotational analysis of absorption bands of CeO, Proc. Phys. Soc. London, 1967, 90, 869. [all data]

Rosen, 1970
Rosen, B., International tables of selected constants. 17. Spectroscopic data relative to diatomic molecules, Pub. Pergamon Press, Oxford, 1970, 0. [all data]

Watson, 1938
Watson, W.W., Spectra of the monoxides of cerium and praseodymium, Phys. Rev., 1938, 53, 639. [all data]

Walsh, Dever, et al., 1961
Walsh, P.N.; Dever, D.F.; White, D., Rare Earths. III. A mass-spectrometric investigation of the isomolecular oxygen-exchange reactions of lanthanum, cerium, praseodymium and neodymium with their monoxides, J. Phys. Chem., 1961, 65, 1410. [all data]

Ames, Walsh, et al., 1967
Ames, L.L.; Walsh, P.N.; White, D., Rare earths. IV. Dissocaition energies of the gaseous monoxides of the rare earths, J. Phys. Chem., 1967, 71, 2707. [all data]

Coppens, Smoes, et al., 1967
Coppens, P.; Smoes, S.; Drowart, J., Mass spectrometric determination of the dissociation energies of the molecules GeS, ScS, YS, LaS, and CeS, Trans. Faraday Soc., 1967, 63, 2140. [all data]

Ackermann and Rauh, 1974
Ackermann, R.J.; Rauh, E.G., Thermodynamic properties of ZrO (g) and HfO (g); a critical examination of isomolecular oxygen-exchange reactions, J. Chem. Phys., 1974, 60, 2266. [all data]


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