Germylene
- Formula: GeH2
- Molecular weight: 74.66
- IUPAC Standard InChIKey: MWRNXFLKMVJUFL-UHFFFAOYSA-N
- CAS Registry Number: 24968-55-6
- Chemical structure:
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, 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: José A. Martinho Simões
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
By formula: H3Ge (g) = H (g) + H2Ge (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | >56.4 | kcal/mol | PIMS | Ruscic, Schwarz, et al., 1990 | Temperature: 0 K. A value of 59.0 kcal/mol is recommended in Ruscic, Schwarz, et al., 1990. |
(g) = HGe (g) +
(g)
By formula: H2Ge (g) = HGe (g) + H (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | <68.8 | kcal/mol | PIMS | Ruscic, Schwarz, et al., 1990 | Temperature: 0 K. A value of 66.2 kcal/mol is recommended in Ruscic, Schwarz, et al., 1990. |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, NIST Free Links, 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 H2Ge+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
1.0970 ± 0.0027 | LPES | Miller, Miller, et al., 1986 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
≤9.25 | PI | Ruscic, Schwarz, et al., 1990 | LL |
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: Marilyn E. Jacox
State: A
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 16325.54 | gas | A-X | 489 | 850 | Saito and Obi, 1993 | ||
Saito and Obi, 1994 | |||||||
Karolczak, Harper, et al., 1995 | |||||||
Campargue and Escribano, 1999 | |||||||
Smith, Clouthier, et al., 2000 | |||||||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1 | Sym. stretch | 1798.4 | gas | LF | Karolczak, Harper, et al., 1995 | |
2 | Bend | 783.0 | gas | LF | Saito and Obi, 1993 Saito and Obi, 1994 Karolczak, Harper, et al., 1995 | ||
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1 | Sym. stretch | 1856 | gas | LF | Smith, Clouthier, et al., 2000 | |
1 | Sym. stretch | 1862.5 | Ne | IR | Wang, Andrews, et al., 2002 | ||
1 | Sym. stretch | 1860.4 | Ne | IR | Wang, Andrews, et al., 2002 | ||
1 | Sym. stretch | 1839.2 | Ar | IR | Wang, Andrews, et al., 2002 | ||
1 | Sym. stretch | 1858.5 | H2 | IR | Wang and Andrews, 2003 | ||
1 | Sym. stretch | 1854.5 | H2 | IR | Wang and Andrews, 2003 | ||
2 | Bend | 916 | gas | LF | Saito and Obi, 1993 Smith, Clouthier, et al., 2000 | ||
2 | Bend | 921.5 | Ne | IR | Wang, Andrews, et al., 2002 | ||
2 | Bend | 913.6 | Ar | IR | Wang, Andrews, et al., 2002 | ||
2 | Bend | 902.8 | H2 | IR | Wang and Andrews, 2003 | ||
b2 | 3 | Asym. stretch | 1862.5 | Ne | IR | Wang, Andrews, et al., 2002 | |
3 | Asym. stretch | 1860.4 | Ne | IR | Wang, Andrews, et al., 2002 | ||
3 | Asym. stretch | 1839.2 | Ar | IR | Wang, Andrews, et al., 2002 | ||
3 | Asym. stretch | 1858.5 | H2 | IR | Wang and Andrews, 2003 | ||
3 | Asym. stretch | 1854.5 | H2 | IR | Wang and Andrews, 2003 | ||
Additional references: Jacox, 1994, page 20; Jacox, 1998, page 132; Jacox, 2003, page 18; Smith and Guillory, 1972; Lloret, Oria, et al., 1991
Notes
o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
Miller, Miller, et al., 1986
Miller, T.M.; Miller, A.E.S.; Lineberger, W.C.,
Electron Affinities of Ge and Sn,
Phys. Rev. A, 1986, 33, 5, 3558, https://doi.org/10.1103/PhysRevA.33.3558
. [all data]
Saito and Obi, 1993
Saito, K.; Obi, K.,
The first observation of the à 1B1-X 1A1 transition of GeH2 and GeD2 radicals,
Chem. Phys. Lett., 1993, 215, 1-3, 193, https://doi.org/10.1016/0009-2614(93)89287-R
. [all data]
Saito and Obi, 1994
Saito, K.; Obi, K.,
The excited state dynamics of the Ã1B1 state of GeH2 and GeD2 radicals,
Chem. Phys., 1994, 187, 3, 381, https://doi.org/10.1016/0301-0104(94)89020-X
. [all data]
Karolczak, Harper, et al., 1995
Karolczak, J.; Harper, W.W.; Grev, R.S.; Clouthier, D.J.,
The structure, spectroscopy, and excited state predissociation dynamics of GeH2,
J. Chem. Phys., 1995, 103, 8, 2839, https://doi.org/10.1063/1.470520
. [all data]
Campargue and Escribano, 1999
Campargue, A.; Escribano, R.,
Room temperature absorption spectroscopy of GeH2 near 585 nm,
Chem. Phys. Lett., 1999, 315, 5-6, 397, https://doi.org/10.1016/S0009-2614(99)01237-3
. [all data]
Smith, Clouthier, et al., 2000
Smith, T.C.; Clouthier, D.J.; Sha, W.; Adam, A.G.,
Laser optogalvanic and jet spectroscopy of germylene (GeH[sub 2]): New spectroscopic data for an important semiconductor growth intermediate,
J. Chem. Phys., 2000, 113, 21, 9567, https://doi.org/10.1063/1.1319936
. [all data]
Wang, Andrews, et al., 2002
Wang, X.; Andrews, L.; Kushto, G.P.,
Infrared Spectra of the Novel Ge,
J. Phys. Chem. A, 2002, 106, 24, 5809, https://doi.org/10.1021/jp020219v
. [all data]
Wang and Andrews, 2003
Wang, X.; Andrews, L.,
Infrared Spectra of Group 14 Hydrides in Solid Hydrogen: Experimental Observation of PbH,
J. Am. Chem. Soc., 2003, 125, 21, 6581, https://doi.org/10.1021/ja029862l
. [all data]
Jacox, 1994
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Smith and Guillory, 1972
Smith, G.R.; Guillory, W.A.,
Products of the Vacuum-Ultraviolet Photolysis of Germane Isolated in an Argon Matrix,
J. Chem. Phys., 1972, 56, 4, 1423, https://doi.org/10.1063/1.1677383
. [all data]
Lloret, Oria, et al., 1991
Lloret, A.; Oria, M.; Seoudi, B.; Abouaf-Marguin, L.,
Infrared detection by the matrix-isolation technique of radicals produced in deposition plasmas: germane,
Chem. Phys. Lett., 1991, 179, 4, 329, https://doi.org/10.1016/0009-2614(91)85161-O
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, References
- Symbols used in this document:
EA Electron affinity ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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