germanium tetrabromide

Formula: Br₄Ge
Molecular weight: 392.26
CAS Registry Number: 13450-92-5
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Other data available:
- Phase change data
- Vibrational and/or electronic energy levels
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Gas phase ion energetics data

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

References

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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]

Notes

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Symbols used in this document:

AE Appearance energy
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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