germanium tetrabromide
- Formula: Br4Ge
- Molecular weight: 392.26
- CAS Registry Number: 13450-92-5
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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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔvapH° | 46.6 ± 0.3 | kJ/mol | N/A | Zelenina, Chusova, et al., 2004 | Based on data from 299. to 373. K. |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 58.6 ± 1.2 | kJ/mol | N/A | Zelenina, Chusova, et al., 2004 | Based on data from 273. to 299. K. |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
12.85 | 299.3 | AC | Berezovskii, Zelenina, et al., 1999 | Based on data from 5. to 315. 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:
LL - Sharon G. Lias and Joel F. Liebman
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.62 ± 0.04 | PI | Creasey, Lambert, et al., 1991 | LL |
10.75 | PE | Green, Green, et al., 1970 | RDSH |
10.8 ± 0.3 | EI | Uy, Muenow, et al., 1969 | RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
Br+ | 22.3 ± 0.6 | ? | PI | Creasey, Lambert, et al., 1991 | LL |
Br+ | 22. ± 1. | ? | EI | Uy, Muenow, et al., 1969 | RDSH |
BrGe+ | 13.6 ± 0.1 | ? | PI | Creasey, Lambert, et al., 1991 | LL |
GeBr+ | 15. ± 1. | ? | EI | Uy, Muenow, et al., 1969 | RDSH |
Br2+ | 19.5 ± 0.5 | ? | EI | Uy, Muenow, et al., 1969 | RDSH |
GeBr2+ | 15. ± 1. | ? | EI | Uy, Muenow, et al., 1969 | RDSH |
Br3Ge+ | 10.97 ± 0.04 | Br | PI | Creasey, Lambert, et al., 1991 | LL |
GeBr3+ | 11.0 ± 0.3 | Br | EI | Uy, Muenow, et al., 1969 | RDSH |
Ge+ | 21.4 ± 0.5 | ? | PI | Creasey, Lambert, et al., 1991 | LL |
Ge+ | 20. ± 1. | ? | EI | Uy, Muenow, et al., 1969 | RDSH |
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 | 235 | C | 235 | liq. | ||||
e | 2 | Deg deform | 79 | C | 79 | liq. | ||||
f2 | 3 | Deg str | 327 | C | 327 | liq. | ||||
f2 | 4 | Deg deform | 112 | C | 112 | liq. | ||||
Source: Shimanouchi, 1972
Notes
C | 3~6 cm-1 uncertainty |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Zelenina, Chusova, et al., 2004
Zelenina, L.N.; Chusova, T.P.; Stenin, Yu.G.,
Zh. Fiz. Khim., 2004, 78, 4, 598. [all data]
Berezovskii, Zelenina, et al., 1999
Berezovskii, G.A.; Zelenina, L.N.; Chusova, T.P.; Paukov, I.E.,
Thermodynamic functions of germanium tetrabromide in temperature interval 5-315 K,
Zh. Fiz. Khim., 1999, 73, 8, 1504. [all data]
Creasey, Lambert, et al., 1991
Creasey, J.C.; Lambert, I.R.; Tuckett, R.P.; Codling, K.; Leszek, J.F.; Hatherly, P.A.; Stankiewicz, M.,
Photoionization mass-spectrometric study of fragmentation of SiBr4 and GeBr4 in the range 400-1220 A,
J. Chem. Soc. Faraday Trans., 1991, 87, 3717. [all data]
Green, Green, et al., 1970
Green, J.C.; Green, M.L.H.; Joachim, P.J.; Orchard, A.F.; Turner, D.W.,
A study of the bonding in the group IV tetrahalides by photoelectron spectroscopy,
Phil. Trans. Roy. Soc. (London), 1970, A268, III. [all data]
Uy, Muenow, et al., 1969
Uy, O.M.; Muenow, D.W.; Margrave, J.L.,
Mass spectrometric studies at high temperatures. Part 35. Stabilities of gaseous GeCl2 and GeBr2,
J. Chem. Soc. Faraday Trans., 1969, 65, 1296. [all data]
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
AE Appearance energy ΔfusH Enthalpy of fusion ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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