Germane
- Formula: GeH4
- Molecular weight: 76.67
- IUPAC Standard InChIKey: QUZPNFFHZPRKJD-UHFFFAOYSA-N
- CAS Registry Number: 7782-65-2
- 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. - Other names: germanium tetrahydride
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Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
110. to 184.3 | 4.10589 | 736.692 | -4.665 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction thermochemistry data
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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 as indicated in comments:
B - John E. Bartmess
MS - José A. Martinho Simões
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Individual Reactions
H3Ge- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1501. ± 8.8 | kJ/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase; B |
ΔrH° | 1502. ± 5.4 | kJ/mol | G+TS | Decouzon, Gal, et al., 1993 | gas phase; The neutral acid ΔHf may be ca. 4 kcal/mol too positive: G2 calculations, Mayer, Gal, et al., 1997; B |
ΔrH° | >1490. ± 11. | kJ/mol | D-EA | Reed and Brauman, 1974 | gas phase; B |
ΔrH° | 1514.6 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; Fe(CO)-(q); ; ΔS(EA)=5.0; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1467. ± 8.4 | kJ/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase; B |
ΔrG° | 1468. ± 5.0 | kJ/mol | IMRE | Decouzon, Gal, et al., 1993 | gas phase; The neutral acid ΔHf may be ca. 4 kcal/mol too positive: G2 calculations, Mayer, Gal, et al., 1997; B |
ΔrG° | >1456. ± 12. | kJ/mol | H-TS | Reed and Brauman, 1974 | gas phase; B |
ΔrG° | 1480.7 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; Fe(CO)-(q); ; ΔS(EA)=5.0; B |
By formula: H4Ge (g) = H (g) + H3Ge (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 348.9 ± 8.4 | kJ/mol | PIMS | Berkowitz, Ellison, et al., 1994 | Please also see Ruscic, Schwarz, et al., 1990. Value recommended in the critical survey Berkowitz, Ellison, et al., 1994.; MS |
ΔrH° | <358. | kJ/mol | PIMS | Ruscic, Schwarz, et al., 1990 | Temperature: 0 K. A value of 343. ± 8. kJ/mol is recommended in Ruscic, Schwarz, et al., 1990.; MS |
By formula: I (g) + H4Ge (g) = HI (g) + H3Ge (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 47.0 ± 4.1 | kJ/mol | KinG | Noble and Walsh, 1983 | MS |
IR Spectrum
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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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
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Additional Data
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Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Sadtler Research Labs Under US-EPA Contract |
State | gas |
Vibrational and/or electronic energy levels
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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: Takehiko Shimanouchi
Symmetry: Td Symmetry Number σ = 12
Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
---|---|---|---|---|---|---|---|---|---|---|
Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
a1 | 1 | Sym str | 2106 | B | ia | 2106 S p | gas | |||
e | 2 | Deg deform | 931 | D | 930.9 ia | gas | 920 W | gas | observed through Coriolis interaction with ν4 | |
f2 | 3 | Deg str | 2114 | B | 2113.6 | gas | 2106 W | liq. | ||
f2 | 4 | Deg deform | 819 | B | 819.3 | gas | 816 W | liq. | ||
Source: Shimanouchi, 1972
Notes
S | Strong |
W | Weak |
ia | Inactive |
p | Polarized |
B | 1~3 cm-1 uncertainty |
D | 6~15 cm-1 uncertainty |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Gal, Decouzon, et al., 2001
Gal, J.F.; Decouzon, M.; Maria, P.C.; Gonzalez, A.I.; Mo, O.; Yanez, M.; El Chaouch, S.; Guillemin, J.C.,
Acidity trends in alpha,beta-unsaturated alkanes, silanes, germanes, and stannanes,
J. Am. Chem. Soc., 2001, 123, 26, 6353-6359, https://doi.org/10.1021/ja004079j
. [all data]
Decouzon, Gal, et al., 1993
Decouzon, M.; Gal, J.F.; Gayraud, J.; Maria, P.C.; Vaglio, G.A.; Volpe, P.,
Fourier Transform-Ion Cyclotron Resonance Study of the Gas-Phase Acidities of Germane and Methylgermane - Bond Dissociation Energy of German,
J. Am. Soc. Mass Spectrom., 1993, 4, 1, 54, https://doi.org/10.1016/1044-0305(93)85042-V
. [all data]
Mayer, Gal, et al., 1997
Mayer, P.M.; Gal, J.-F.; Radom, L.,
The Heats of Formation, Gas-phase Acidities, and Related Thermochemical Properties of the Third-row Hydrides GeH4, AsH3, SeH2, and HBr from G2 ab initio Calculations,
Int. J. Mass Spectrom. Ion Proc., 1997, 167/168, 689, https://doi.org/10.1016/S0168-1176(97)00127-4
. [all data]
Reed and Brauman, 1974
Reed, K.J.; Brauman, J.I.,
Photodetachment of electrons from Group IVa binary hydride anions: The electron affinities of the SiH3 and GeH3 radicals,
J. Chem. Phys., 1974, 61, 4830. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
. [all data]
Berkowitz, Ellison, et al., 1994
Berkowitz, J.; Ellison, G.B.; Gutman, D.,
Three methods to measure RH bond energies,
J. Phys. Chem., 1994, 98, 2744. [all data]
Ruscic, Schwarz, et al., 1990
Ruscic, B.; Schwarz, M.; Berkowitz, J.,
Photoionization studies of GeHn(n = 2-4),
J. Chem. Phys., 1990, 92, 1865. [all data]
Noble and Walsh, 1983
Noble, P.N.; Walsh, R.,
Kinetics of the gas phase reaction between iodine and monogermane and the bond dissociation energy D(H3Ge-H),
Int. J. Chem. Kinet., 1983, 15, 547. [all data]
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]
Notes
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- 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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