Cobalt monohydride
- Formula: CoH
- Molecular weight: 59.94113
- CAS Registry Number: 14994-20-8
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Reaction thermochemistry 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 by: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
Co- + = HCo
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 337.3 ± 6.0 | kcal/mol | D-EA | Scheer, Brodie, et al., 1998 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 333.5 ± 3.0 | kcal/mol | IMRB | Sallans, Lane, et al., 1985 | gas phase |
Constants of diatomic molecules
Go To: Top, Reaction thermochemistry 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 December, 1974
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A2 | A2 ← X2 R | 21982 H | ||||||||||
| ↳Smith, 1973 | ||||||||||||
| A1 Ω=4 4 | [1527.8] Z 1 | 6.701 2 | 0.305 | [0.000620] 3 | 1.5934 | A1 → X1 R | 22243.3 1 Z | |||||
| ↳missing citation; missing citation | ||||||||||||
| X2 | ||||||||||||
| X1 Ω=4 4 | 0 | [7.151] | [0.000405] | [1.5424] | ||||||||
Notes
| 1 | Contrary to the definitions adopted in these tables the band origins here do not include the J-independent terms -Ω2Bv of the rotational energy expressions for the upper and lower states: the zero lines are obtained by adding -Ω2(B'v - B"v) to the values given in the table. Heimer Heimer, 1937, Heimer, 1937, 2 uses a different definition. |
| 2 | v=0 perturbed from J ~ 10 to J ~ 20. |
| 3 | D1 = 5.90E-4. |
| 4 | Possibly 3Φ4 and 3Φ3; 3Φ2 not identified. |
| 5 | Ω-type doubling Δ(v=0) = 0.36E-8J6. Δv(v=1) = 0.45E-8J6. |
| 6 | D1 = 1.326E-4. |
| 7 | Perturbations in all three observed vibrational levels Klynning and Kronekvist, 1972. |
| 8 | x2 ~ 800 cm-1, estimated from the difference B0(Ω=3) - B0(Ω=4). |
| 9 | Constants derived from the upper Ω-type doubling component; Δv = 3.42E-8J6+... |
| 10 | H0 = +2.56E-9; D1 = 1.157E-4, H1 = +5.9E-9; D2 = 1.09E-4. |
References
Go To: Top, Reaction thermochemistry 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.
Scheer, Brodie, et al., 1998
Scheer, M.; Brodie, C.A.; Bilodeau, R.C.; Haugen, H.K.,
Laser spectroscopic measurements of binding energies and fine-structure splittings of Co-, Ni-, Rh-, and Pd-,
Phys. Rev. A, 1998, 58, 3, 2051-2062, https://doi.org/10.1103/PhysRevA.58.2051
. [all data]
Sallans, Lane, et al., 1985
Sallans, L.; Lane, K.R.; Squires, R.R.; Freiser, B.S.,
Generation and reactions of atomic metal anions in the gas phase. Determination of the heterolytic and homolytic bond energies of VH, VrH, FeH, CoH, and MoH,
J. Am. Chem. Soc., 1985, 107, 4379. [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, 1937
Heimer, A.,
Dissertation, Stockholm, 1937, 0. [all data]
Heimer, 1937, 2
Heimer, A.,
Das bandenspektrum des kobalthydrids,
Z. Phys., 1937, 104, 448. [all data]
Klynning and Kronekvist, 1972
Klynning, L.; Kronekvist, M.,
Rotational analysis of the A-X band system of CoD,
Phys. Scr., 1972, 6, 61. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Constants of diatomic molecules, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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