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Monopotassium monooxide

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 January, 1977

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 (39)K16O
A 2Pi (347) 1 (442) 1        (2.33) 1  
X 2Sigma+ 0 1 (384) 2        (2.22) 1  


1Ab initio calculation by So and Richards, 1975. The relative position of the two states is in accordance with results of a magnetic deflection analysis of M + NO2 scattering products (M = alkali metal) by Herm and Herschbach, 1970.
2Fundamental in solid nitrogen matrix Spiker and Andrews, 1973; the ab initio value is omegae = 467 cm-1 So and Richards, 1975.
3From a merging beam study of the reaction CO+ (K,C) KO+ Rol, Entemann, et al., 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.

So and Richards, 1975
So, S.P.; Richards, W.G., The electronic ground states of alkali monoxides, Chem. Phys. Lett., 1975, 32, 227. [all data]

Herm and Herschbach, 1970
Herm, R.R.; Herschbach, D.R., Molecular beam kinetics: reactions of alkali atoms with NO2 and CH3NO2, J. Chem. Phys., 1970, 52, 5783. [all data]

Spiker and Andrews, 1973
Spiker, R.C., Jr.; Andrews, L., Matrix reactions of Na, K, Rb, and Cs atoms with N2O: infrared spectra geometries of K2O, Rb2O, and Cs2O, J. Chem. Phys., 1973, 58, 713. [all data]

Rol, Entemann, et al., 1974
Rol, P.K.; Entemann, E.A.; Wendell, K.L., Merging beams studies of Na, K, and Mg collisions with atmospheric ions, J. Chem. Phys., 1974, 61, 2050. [all data]


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