Monopotassium monooxide
- Formula: KO
- Molecular weight: 55.0977
- IUPAC Standard InChI: InChI=1S/K.O
- IUPAC Standard InChIKey: RQPCXPDUSNVHSU-UHFFFAOYSA-N
- CAS Registry Number: 12401-70-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Gas phase ion energetics data
Go To: Top, Constants of diatomic molecules, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 7.1 ± 0.1 | S | Butman, Kudin, et al., 1984 | LBLHLM |
| 8.0 ± 1.0 | S | Farber, Srivastava, et al., 1982 | LBLHLM |
| 8. ± 1. | EI | Ehlert, 1977 | LLK |
| 7.1 ± 0.2 | EI | Ehlert, 1977 | LLK |
Constants of diatomic molecules
Go To: Top, Gas phase ion energetics data, References, Notes
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
| Symbol | Meaning |
|---|---|
| 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) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A 2Π | (347) 1 | (442) 1 | (2.33) 1 | |||||||||
| X 2Σ+ | 0 1 | (384) 2 | (2.22) 1 |
Notes
| 1 | Ab 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. |
| 2 | Fundamental in solid nitrogen matrix Spiker and Andrews, 1973; the ab initio value is ωe = 467 cm-1 So and Richards, 1975. |
| 3 | From a merging beam study of the reaction CO+ (K,C) KO+ Rol, Entemann, et al., 1974. |
References
Go To: Top, Gas phase ion energetics data, 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.
Butman, Kudin, et al., 1984
Butman, M.F.; Kudin, L.S.; Krasnov, K.S.,
The Mass-spectrometric determination of the proton affinity of the molecules M2O (M = Na, K, Rb, Cs),
Russ. J. Inorg. Chem., 1984, 29, 1228, In original 2150. [all data]
Farber, Srivastava, et al., 1982
Farber, M.; Srivastava, R.D.; Moyer, J.W.,
Mass spectrometric determination of the thermodynamics of potassium hydroxide and minor potassium-containing species required in magnetohydrodynamic power systems,
J. Chem. Thermodyn., 1982, 14, 1103. [all data]
Ehlert, 1977
Ehlert, T.C.,
Mass spectrometric investigations of the oxides of potassium,
High Temp. Sci., 1977, 9, 237. [all data]
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]
Notes
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.