manganese oxide
- Formula: MnO
- Molecular weight: 70.9374
- CAS Registry Number: 1344-43-0
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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 March, 1975
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B | (B ← X) 1 | (38950) | ||||||||||
| ↳missing citation; Garrett, Lee, et al., 1966 | ||||||||||||
| A 6Σ | 17949 | 762.8 H | 9.6 2 | 0.06 | (0.390) 3 | (1.868) 3 | A ↔ X R | 17909 2 H | ||||
| ↳Sen Gupta, 1934; missing citation; Das Sarma, 1959; Callear and Norrish, 1960; Joshi, 1962; Garrett, Lee, et al., 1966; Thompson, Easley, et al., 1973; Pinchemel and Schamps, 1975 | ||||||||||||
| X 6Σ | 0 4 | 839.6 H | 4.79 | (0.435) 3 | (1.769) 3 | |||||||
Notes
| 1 | Seemingly continuous absorption, strongest in the region 38800-39100 cm-1; some indication of band heads. It is not certain that this system is due to MnO. |
| 2 | Heads having v'=0 are ill defined. |
| 3 | Partial rotational analysis of the 1-0 band Pinchemel and Schamps, 1975: spin-spin interaction constants λ' ~ 0 Pinchemel and Schamps, 1975, λ" ~ +0.66 cm-1 Pinchemel and Schamps, 1975. Hyperfine broadening of all rotational lines: many bands are highly perturbed Kay, 1974. |
| 4 | Matrix studies at 4 K Thompson, Easley, et al., 1973 support the view that the lower state of A-X is the ground state. |
| 5 | Thermochemical value (mass spectrom.)[Burns, quoted in Cheetam and Barrow, 1967, Coppens, Smoes, et al., 1967]. Flame photometric values are approximately 4.1 eV Huldt and Lagerqvist, 1952, Padley and Sugden, 1959. |
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.
Garrett, Lee, et al., 1966
Garrett, M.B.; Lee, P.S.; Kay, J.G.,
Flash heating and kinetic spectroscopy of KMnO4,
J. Chem. Phys., 1966, 45, 2698. [all data]
Sen Gupta, 1934
Sen Gupta, A.K.,
Das bandenspektrum des manganoxyds,
Z. Phys., 1934, 91, 471. [all data]
Das Sarma, 1959
Das Sarma, J.M.,
Band spectrum of manganese oxide (MnO),
Z. Phys., 1959, 157, 98. [all data]
Callear and Norrish, 1960
Callear, A.B.; Norrish, R.G.W.,
The behaviour of additives in explosions and the mechanism of antiknock,
Proc. R. Soc. London A, 1960, 259, 304-324. [all data]
Joshi, 1962
Joshi, K.C.,
Flame spectrum of MnO molecule in the visible region,
Spectrochim. Acta, 1962, 18, 625. [all data]
Thompson, Easley, et al., 1973
Thompson, K.R.; Easley, W.C.; Knight, L.B.,
Spectra of matrix isolated transition metal monoxides. Maganese(II) and copper(II) oxides. Evidence for a 2Π ground state for copper(II) oxide,
J. Phys. Chem., 1973, 77, 49. [all data]
Pinchemel and Schamps, 1975
Pinchemel, B.; Schamps, J.,
Etude de la transition A6Σ+-X6Σ+ de l'oxyde de manganese MnO,
Can. J. Phys., 1975, 53, 431. [all data]
Kay, 1974
Kay, J.G.,
Private communication in Huber and Herzberg, 1979, 1974, 409. [all data]
Cheetam and Barrow, 1967
Cheetam, C.J.; Barrow, R.F.,
Adv. High Temp. Chem., 1967, 1, 7. [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]
Huldt and Lagerqvist, 1952
Huldt, L.; Lagerqvist, A.,
Determination of dissociation energies of diatomic molecules from spectroscopic intensity measurements. The dissociation energies of CrO and MnO,
Ark. Fys., 1952, 3, 525. [all data]
Padley and Sugden, 1959
Padley, P.J.; Sugden, T.M.,
Determination of the dissociation constants and heats of formation of molecules by flame photometry. Part 6. Stabilities of MnO and MnOH and their mechanisms of formation,
Trans. Faraday Soc., 1959, 55, 2054. [all data]
Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G.,
Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Company, New York, 1979, 716. [all data]
Notes
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