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Carbon monoxide anion


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, 1976

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 12C16O-
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
F  1730 40        b 13.95 ev 1
Sanche and Schulz, 1972; Schulz, 1973
E           d 12.2 ev 1
Mazeau, Gresteau, et al., 1972; Sanche and Schulz, 1972; Schulz, 1973
D           d 11.3 ev 1
Mazeau, Gresteau, et al., 1972; Sanche and Schulz, 1972; Schulz, 1973
C 2Pi            10.7 ev 1
Comer and Read, 1971; Mazeau, Gresteau, et al., 1972; Sanche and Schulz, 1972; Schulz, 1973
            10.42 ev 1
Comer and Read, 1971; Sanche and Schulz, 1972; Schulz, 1973
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
B 2Sigma+  [1940]         e 10.04 ev 1
Comer and Read, 1971; Mazeau, Gresteau, et al., 1972; Sanche and Schulz, 1972; Schulz, 1973
A 2            6.0 ev 1
Wong and Schulz, 1974
X 2Pi 7            1.5 ev 1
Boness, Hasted, et al., 1968

Notes

1Energies in eV above X 1Sigma+(v=0) of CO+, all obtained as resonances in electron scattering experiments.
2Resonances with the vibrational level v-0,1,2 of a3Pi of CO, ascribed to a state of CO- with the same potential function as a3Pi.
3From D00(CO) and the electron affinities of CO (-1.5 eV) and 0 (+1.465 eV).
4Progression of six resonances, observed in electron transmission Sanche and Schulz, 1972 and electroionization Carbonneau and Marmet, 1973 experiments; vibrational numbering uncertain. Its "grandparent" is assumed to be the A 2Pi state of CO+, with the additional two electrons in a Rydberg orbital.
5Resonances in the excitation functions of CO, B 1Sigma+ and b 3Sigma+ Mazeau, Gresteau, et al., 1972, and in the electron transmission current Sanche and Schulz, 1972.
6Sharp resonance (width ~0.045 eV); v'=0 and 1. The parent states are b 3Sigma+ and B 1Sigma+ of CO. Decay into CO(X 1Sigma, a 3Pi, a' 3Sigma, A 1Pi) + e-, C + O-, and C- + O: see also Swanson, Celotta, et al., 1975.
7Very broad resonance, vibrational structure barely detectable.

References

Go To: Top, Constants of diatomic molecules, Notes

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

Sanche and Schulz, 1972
Sanche, L.; Schulz, G.J., Electron transmission spectroscopy: core-excited resonances in diatomic molecules, Phys. Rev. A: Gen. Phys., 1972, 6, 69. [all data]

Schulz, 1973
Schulz, G.J., Resonances in electron impact on diatomic molecules, Rev. Mod. Phys., 1973, 45, 423. [all data]

Mazeau, Gresteau, et al., 1972
Mazeau, J.; Gresteau, F.; Joyez, G.; Reinhardt, J.; Hall, R.I., Resonances in electron scattering from CO, J. Phys. B:, 1972, 5, 1890-1897. [all data]

Comer and Read, 1971
Comer, J.; Read, F.H., Resonance scattering of electrons from CO, J. Phys. B:, 1971, 4, 1678-1682. [all data]

Wong and Schulz, 1974
Wong, S.F.; Schulz, G.J., Electron impact near the a3«PI» state of CO: dipole-dominated resonances, Phys. Rev. Lett., 1974, 33, 3, 134-136. [all data]

Boness, Hasted, et al., 1968
Boness, M.J.W.; Hasted, J.B.; Larkin, I.W., Compound state electron spectra of simple molecules, Proc. R. Soc. London A, 1968, 305, 493-515. [all data]

Carbonneau and Marmet, 1973
Carbonneau, R.; Marmet, P., Negative and neutral autoionizing states detected in the electroionization curve in CO, Can. J. Phys., 1973, 51, 2202. [all data]

Swanson, Celotta, et al., 1975
Swanson, N.; Celotta, R.J.; Kuyatt, C.E.; Cooper, J.W., Resonant structure in electron impact excitation of CO near threshold, J. Chem. Phys., 1975, 62, 4880. [all data]


Notes

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