Methyl germane
- Formula: CH6Ge
- Molecular weight: 90.70
- CAS Registry Number: 1449-65-6
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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.
Data compiled by: William E. Acree, Jr., James S. Chickos
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.11 | 181. | N/A | Amberger and Boeters, 1961 | Based on data from 164. to 197. K. |
| 3.97 | 194. | SG | Griffiths and Onyszchuk, 1961 | Based on data from 159. to 230. K. |
Gas phase ion energetics 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
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.0 | PE | Drake, Glavincevski, et al., 1979 | LLK |
| 11.00 | PE | Drake, Glavincevski, et al., 1979 | Vertical value; LLK |
De-protonation reactions
CH5Ge- + = CH6Ge
By formula: CH5Ge- + H+ = CH6Ge
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 367.3 ± 2.1 | kcal/mol | G+TS | Decouzon, Gal, et al., 1993 | gas phase; B |
| ΔrH° | 366.7 ± 2.1 | kcal/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 359.3 ± 2.0 | kcal/mol | IMRE | Decouzon, Gal, et al., 1993 | gas phase; B |
| ΔrG° | 358.7 ± 2.0 | kcal/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase; B |
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: C3ν Symmetry Number σ = 3
| Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
| a1 | 1 | CH3 s-str | 2938 | B | 2937.8 S | gas | ||||
| a1 | 2 | GeH3 s-str | 2085 | B | 2084.8 S | gas | ||||
| a1 | 3 | CH3 s-deform | 1254 | B | 1254.1 M | gas | ||||
| a1 | 4 | GeH3 s-deform | 843 | B | 842.5 VS | gas | ||||
| a1 | 5 | CGe str | 602 | B | 601.6 VS | gas | ||||
| a2 | 6 | Torsion | 157 | D | ia | ν158.1νA) MW. ν156.1νE) | ||||
| e | 7 | CH3 d-str | 2997 | B | 2997.2 S | gas | ||||
| e | 8 | GeH3 d-str | 2084 | B | 2084.3 S | gas | ||||
| e | 9 | CH3 d-deform | 1428 | C | 1427.7 W | gas | ||||
| e | 10 | GeH3 d-deform | 900 | C | 900.4 S | gas | ||||
| e | 11 | CH3 rock | 848 | C | 847.5 S | gas | ||||
| e | 12 | GeH3 rock | 506 | C | 505.9 S | gas | ||||
Source: Shimanouchi, 1972
Notes
| VS | Very strong |
| S | Strong |
| M | Medium |
| W | Weak |
| ia | Inactive |
| MW | Torsional Frequency calculated from microwave spectroscopic data. |
| B | 1~3 cm-1 uncertainty |
| C | 3~6 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.
Amberger and Boeters, 1961
Amberger, E.; Boeters, H.,
Darstellung der Methylchlorgermane,
Angew. Chem., 1961, 73, 3, 114-114, https://doi.org/10.1002/ange.19610730309
. [all data]
Griffiths and Onyszchuk, 1961
Griffiths, J.E.; Onyszchuk, M.,
ORGANOGERMANIUM COMPOUNDS: PART I. THE INTERACTION OF HEXAMETHYLDIGERMOXANE AND TRIMETHYLMETHOXYGERMANE WITH BORON TRIFLUORIDE,
Can. J. Chem., 1961, 39, 2, 339-347, https://doi.org/10.1139/v61-040
. [all data]
Drake, Glavincevski, et al., 1979
Drake, J.E.; Glavincevski, B.M.; Gorzelska, K.,
The photoelectron spectra of methylgermane, trifluoro- and trichloro-methylgermane,
J. Electron Spectrosc. Relat. Phenom., 1979, 17, 73. [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]
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]
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume II,
J. Phys. Chem. Ref. Data, 1972, 6, 3, 993-1102. [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 ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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