tin dibromide

Formula: Br₂Sn
Molecular weight: 278.518
CAS Registry Number: 10031-24-0
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Other data available:
- Vibrational and/or electronic energy levels
Data at other public NIST sites:
- X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase ion energetics data

Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to Br₂Sn⁺ (ion structure unspecified)

Ionization energy determinations

IE (eV)	Method	Reference	Comment
9.0	PE	Novak and Potts, 1984	LBLHLM
10.6 ± 0.2	EI	Hirayama and Straw, 1984	LBLHLM
10.0 ± 0.4	EI	Knowles, Nicholson, et al., 1970	RDSH
9.83	PE	Novak and Potts, 1984	Vertical value; LBLHLM
9.87 ± 0.05	PE	Harris, Lappert, et al., 1976	Vertical value; LLK
9.85 ± 0.05	PE	Evans and Orchard, 1975	Vertical value; LLK

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
Br⁺	18.5 ± 0.5	Sn+Br	EI	Hirayama and Straw, 1984	LBLHLM
BrSn⁺	11.2 ± 0.2	Br	EI	Hirayama and Straw, 1984	LBLHLM
SnBr⁺	11.0 ± 0.4	Br	EI	Knowles, Nicholson, et al., 1970	RDSH
Sn⁺	14.9 ± 0.3	2Br	EI	Hirayama and Straw, 1984	LBLHLM
Sn⁺	12.8 ± 1.0	?	EI	Knowles, Nicholson, et al., 1970	RDSH

References

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Novak and Potts, 1984
Novak, I.; Potts, A.W., Ultraviolet photoelectron spectra of gas phase and condensed tin and lead dihalides (MX₂, M = Sn, Pb X = Cl, Br, I), J. Electron Spectrosc. Relat. Phenom., 1984, 33, 1. [all data]

Hirayama and Straw, 1984
Hirayama, C.; Straw, R.D., The mass spectra of vapors over SnI₂, SnBr₂, amd SnI₂ + SnBr₂, and the enthalpy of formation of SnIBr, Thermochim. Acta, 1984, 80, 297. [all data]

Knowles, Nicholson, et al., 1970
Knowles, D.J.; Nicholson, A.J.C.; Swingler, D.L., Electron impact studies. II.Stannous bromide and stannic bromide, J. Phys. Chem., 1970, 74, 3642. [all data]

Harris, Lappert, et al., 1976
Harris, D.H.; Lappert, M.F.; Pedley, J.B.; Sharp, G.J., Bonding studies of compounds of group 3-5 elements. Part XVIII. He(I) photoelectron spectra of bivalent homoleptic alkyls and amides, especially of group 4 elements, and of tin(II) chloride and bromide, J. Chem. Soc. Dalton Trans., 1976, 945. [all data]

Evans and Orchard, 1975
Evans, S.; Orchard, A.F., The vapour phase ultra-violet photoelectron spectroscopy of metal halides at elevated temperatures, J. Electron Spectrosc. Relat. Phenom., 1975, 6, 207. [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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