Germanium monohydride
- Formula: GeH
- Molecular weight: 73.65
- IUPAC Standard InChI: InChI=1S/GeH/h1H
- IUPAC Standard InChIKey: ROUHNNRKLNITEM-UHFFFAOYSA-N
- CAS Registry Number: 13572-99-1
- Chemical structure:
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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
Ge- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1457. ± 21. | kJ/mol | D-EA | Scheer, Bilodeau, et al., 1998 | gas phase; Given: 1.232712(15) eV |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1434. ± 22. | kJ/mol | H-TS | Scheer, Bilodeau, et al., 1998 | gas phase; Given: 1.232712(15) eV |
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 September, 1976
| 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 (2Σ) | [41074] 1 | B ← X R | 39686 H | |||||||||
| ↳Barrow, Drummond, et al., 1953 | ||||||||||||
| B ← X R | 40573 H | |||||||||||
| ↳Barrow, Drummond, et al., 1953 | ||||||||||||
| A 2Δ | 25454 2 | [1185.15] Z | (127) 3 | 6.535 4 | 0.6196 | [0.000571] 5 | 1.611 | A ↔ X R | 25197.0 Z | |||
| ↳missing citation; missing citation; Veseth, 1973 | ||||||||||||
| a 4Σ(-) | [16747] 6 | [6.7654] 6 | [0.000460] | [1.5834] | a → X V | 15802.8 Z | ||||||
| ↳Kleman and Werhagen, 1953; Klynning, 1966 | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| X 2Πr | 0 7 | [1833.77] Z | (37) 3 | 6.7259 8 | 0.1916 | [0.000326] 9 | 1.5880 | |||||
Notes
| 1 | Incompletely resolved bands. |
| 2 | A0 = 10.3, A1 = 6.1; moderate J dependence. For a more detailed theoretical discussion of this 2Δ state see Veseth, 1971. |
| 3 | Estimated from isotope shifts Klynning and Lindgren, 1966. |
| 4 | Spin-doubling constants γ = 0.473 (v=0) and γ= 0.362 (v=1). Broadening of absorption lines due to predissociation above 27000 cm-1. |
| 5 | D1 = 8.01E-4; also higher order constants. |
| 6 | Spin-splitting constants 13= 6.52, γ1 = 0.037, γ2 = 0.048. Note that the definitions of 13, γ1 and γ2 used in Klynning, 1966 are those of Hougen Hougen, 1962 and differ from those used by Martin and Merer [see ref. Klynning and Lindgren, 1966 of GeF). The B0 value in the abstract of Klynning, 1966 and quoted in DONNSPEC is clearly wrong. |
| 7 | A0 = 892.52 Klynning and Lindgren, 1966, A1 = 896.12 Klynning and Lindgren, 1966; small J dependence. See also Veseth, 1973. |
| 8 | Λ-type doubling, Δv(2Π1/2) = 0.496(J+1/2)-...; v=0 |
| 9 | D1 = 3.40E-4. |
| 10 | From the predissociation in A 2Δ Klynning and Lindgren, 1966; thermochemical data give the same value Barrow and Deutsch, 1960. |
| 11 | From the value for GeH. |
| 12 | A0 = 14.4, A1 = 9.9, A2 = 7.2; moderate J dependence. |
| 13 | Spin-doubling constants γ= 0.300 (v=0), γ= 0.281 (v=1), γ= 0.22 (v=2). Predissociation, see 4 . |
| 14 | D1 = 1.65E-4, D2 = 1.7E-4; also higher order constants. |
| 15 | A0 = 891.86 Klynning and Lindgren, 1966, A1 = 894.35 Klynning and Lindgren, 1966; small J dependence. See also Veseth, 1973. |
| 16 | Λ-type doubling; in Δv(2Π1/2) = 0.2506(J+1/2) - ...; v=0 |
| 17 | D1 = 0.824E-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, Bilodeau, et al., 1998
Scheer, M.; Bilodeau, R.C.; Brodie, C.A.; Haugen, H.K.,
Systematic study of the stable states of C-, Si-, Ge-, and Sn- via infrared laser spectroscopy,
Phys. Rev. A, 1998, 58, 4, 2844-2856, https://doi.org/10.1103/PhysRevA.58.2844
. [all data]
Barrow, Drummond, et al., 1953
Barrow, R.F.; Drummond, G.; Garton, W.R.S.,
Ultra-violet bands associated with germanium,
Proc. Phys. Soc. London Sect. A, 1953, 66, 191. [all data]
Veseth, 1973
Veseth, L.,
Some anomalies in the electronic spectra of GeH, GeD, SnH, and SnD related to Hund's coupling case (c),
J. Mol. Spectrosc., 1973, 48, 283. [all data]
Kleman and Werhagen, 1953
Kleman, B.; Werhagen, E.,
A 4Σ--2Π-system in germanium hydride (GeH),
Ark. Fys., 1953, 6, 399. [all data]
Klynning, 1966
Klynning, L.,
On the 4Σ state of GeH,
Ark. Fys., 1966, 32, 563. [all data]
Veseth, 1971
Veseth, L.,
Second-order spin-orbit splitting in 2Δ states of diatomic molecules,
Physica (Amsterdam), 1971, 56, 286. [all data]
Klynning and Lindgren, 1966
Klynning, L.; Lindgren, B.,
Rotational analysis of the 2Δ-2Π band system of GeH and of GeD,
Ark. Fys., 1966, 32, 575. [all data]
Hougen, 1962
Hougen, J.T.,
The rotational energy levels of diatomic molecules in 4Σ electronic states,
Can. J. Phys., 1962, 40, 598. [all data]
Barrow and Deutsch, 1960
Barrow, R.F.; Deutsch, J.L.,
Gaseous SiH and GeH,
Proc. Chem. Soc. London, 1960, 122. [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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