germanium tetrabromide


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
Δvap46.6 ± 0.3kJ/molN/AZelenina, Chusova, et al., 2004Based on data from 299. to 373. K.
Quantity Value Units Method Reference Comment
Δsub58.6 ± 1.2kJ/molN/AZelenina, Chusova, et al., 2004Based on data from 273. to 299. K.

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Method Reference Comment
12.85299.3ACBerezovskii, Zelenina, et al., 1999Based 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 ± 0.04PICreasey, Lambert, et al., 1991LL
10.75PEGreen, Green, et al., 1970RDSH
10.8 ± 0.3EIUy, Muenow, et al., 1969RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
Br+22.3 ± 0.6?PICreasey, Lambert, et al., 1991LL
Br+22. ± 1.?EIUy, Muenow, et al., 1969RDSH
BrGe+13.6 ± 0.1?PICreasey, Lambert, et al., 1991LL
GeBr+15. ± 1.?EIUy, Muenow, et al., 1969RDSH
Br2+19.5 ± 0.5?EIUy, Muenow, et al., 1969RDSH
GeBr2+15. ± 1.?EIUy, Muenow, et al., 1969RDSH
Br3Ge+10.97 ± 0.04BrPICreasey, Lambert, et al., 1991LL
GeBr3+11.0 ± 0.3BrEIUy, Muenow, et al., 1969RDSH
Ge+21.4 ± 0.5?PICreasey, Lambert, et al., 1991LL
Ge+20. ± 1.?EIUy, Muenow, et al., 1969RDSH

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

C3~6 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.

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

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