Manganese monohydride
- Formula: HMn
- Molecular weight: 55.94599
- CAS Registry Number: 14452-76-7
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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:
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess
View reactions leading to HMn+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.869 ± 0.010 | LPES | Stevens, Feigerle, et al., 1983 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.8 | DER | Lias, Bartmess, et al., 1988 | LL |
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 October, 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Complex rotational structure from 22600 to 24000 (max. 23360 - 23930) cm-1; in emission. | ||||||||||||
↳missing citation | ||||||||||||
Open but very strongly perturbed rotational structure in the region 21270 - 22580 cm-1; in emissionand absorption. Probably quintet transition. | ||||||||||||
↳missing citation; missing citation; Smith, 1973 | ||||||||||||
Extremely complicated R shaded band with very dense structure centered around 20900 cm-1; in emission and absorption. Probably quintet system. | ||||||||||||
↳Heimer, 1936; missing citation; missing citation; Smith, 1973 | ||||||||||||
Complex rotational structure from 11200 to 14500 cm-1; in emission. | ||||||||||||
↳missing citation | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
A 7Π | 17597 1 2 | [1623] 3 | (33) | 6.425 4 5 | 0.187 | [3.62E-4] 6 | 1.628 | A ↔ X V | 17666 3 | |||
↳Heimer, 1936; missing citation; missing citation; Nevin, 1945; missing citation; Nevin and Stephens, 1953 | ||||||||||||
X 7Σ | 0 1 | 1548.0 Z | 28.8 | 5.6841 4 | 0.1570 7 | [3.039E-4] 8 | 1.7311 | |||||
↳Hayes, McCarvill, et al., 1957; Kovacs and Scari, 1959; Kovacs and Pacher, 1975 |
Notes
1 | For and ab initio calculation of these two states see Bagus and Schaefer, 1973. |
2 | A = 40.6 [see Kovacs and Pacher, 1975]. |
3 | From approximate origins for the F4 component. |
4 | Approxiamte ("effective") constants. Improved ("true") constants for MnH (v=0) together with spin-orbit, spin-spin, spin-rotation interaction and l-uncoupling constants in Kovacs and Pacher, 1975. See also Kovacs, 1959, Pacher, 1974. |
5 | Perturbations. |
6 | D1 = 3.64E-4; H0 = 8.2E-9, H1 = 7.4E-9. |
7 | γe= -0.0019. |
8 | D1 = 3.053E-4; D2 = 3.08E-4; H0 = 9.33E-9; H1 = 9.79E-9; H2 = 10.2E-9. Hv values in Pacher, 1974 differ by an order of magnitude. |
9 | From the values for MnH. |
10 | H0 = 1.2E-9. |
11 | D1 = 8.22E-5; D2 = 8.36E-5; H0 = 1.41E-9; H1 = 2.17E-9, H2 = 2.93E-9. |
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.
Stevens, Feigerle, et al., 1983
Stevens, A.E.; Feigerle, C.S.; Lineberger, W.C.,
Laser photoelectron spectroscopy of MnH- and FeH-: Electronic structures of the metal hydrides, identification of a low spin excited state of MnH,
J. Chem. Phys., 1983, 78, 5420. [all data]
Lias, Bartmess, et al., 1988
Lias, S.G.; Bartmess, J.E.; Liebman, J.F.; Holmes, J.L.; Levin, R.D.; Mallard, W.G.,
Gas-phase ion and neutral thermochemistry,
J. Phys. Chem. Ref. Data, Suppl. 1, 1988, 17, 1-861. [all data]
Smith, 1973
Smith, R.E.,
Diatomic hydride and deuteride spectra of the second row transition metals,
Proc. R. Soc. London A, 1973, 332, 113. [all data]
Heimer, 1936
Heimer, T.,
Das bandenspektrum von MnH,
Die Naturwissenschaften, 1936, 24, 521. [all data]
Nevin, 1945
Nevin, T.E.,
The spectrum of manganese hydride, MnH. II. The structure of the A7Π and X7Σ states,
Proc. R. Ir. Acad. Sect. A:, 1945, 50, 123-137. [all data]
Nevin and Stephens, 1953
Nevin, T.E.; Stephens, D.V.,
New observations on the band spectra of MnH and MnD,
Proc. R. Ir. Acad. Sect. A:, 1953, 55, 109-116. [all data]
Hayes, McCarvill, et al., 1957
Hayes, W.; McCarvill, P.D.; Nevin, T.E.,
The structure of the X7Σ state of MnH and MnD,
Proc. Phys. Soc. London Sect. A, 1957, 70, 904. [all data]
Kovacs and Scari, 1959
Kovacs, I.; Scari, O.,
Intensity formulae for 7Π = 7Σ band,
Acta Phys. Acad. Sci. Hung., 1959, 9, 423. [all data]
Kovacs and Pacher, 1975
Kovacs, I.; Pacher, P.,
Fine structure of 7Π and 7Σ states in diatomic molecules,
J. Phys. B:, 1975, 8, 796. [all data]
Bagus and Schaefer, 1973
Bagus, P.S.; Schaefer, H.F., III,
7Σ+ and 7Π states of manganese hydride,
J. Chem. Phys., 1973, 58, 1844. [all data]
Kovacs, 1959
Kovacs, J.,
On the structure of multiplet Σ states in diatomic molecules,
Proc. R. Ir. Acad. Sect. A:, 1959, 60, 15-26. [all data]
Pacher, 1974
Pacher, P.,
Fine structure of septet states in diatomic molecules, the X7Σ+ state of MnH,
Acta Phys. Acad. Sci. Hung., 1974, 35, 73. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References
- Symbols used in this document:
EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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