Tin(IV) bromide

Structure

SnBr4 crystallises in a monoclinic crystal system with molecular SnBr4 units that have distorted tetrahedral geometry. The mean Sn-Br bond length is 242.3 pm.

Preparation

SnBr4 can be prepared by reaction of the elements at standard temperature and pressure (STP): : + 2 →

Reactions

In aqueous solution SnBr4 dissolves to give a series of octahedral (six-ligated) bromo-aquo complexes. These include and cis- and trans-.

SnBr4 forms 1:1 and 1:2 complexes with ligands. With trimethylphosphine both .

Tin(IV) bromide undergoes redistribution with tin(IV) chloride as assessed by 119Sn NMR and Raman spectroscopy. Equilibrium is achieved in seconds at room temperature. By contrast, halide exchange for related germanium and especially silicon halides is slower.

References

References

1. {{Greenwood&Earnshaw
2. (1963). "Die Kristallstruktur von SnBr₄". [[Acta Crystallographica]].
3. (2001). "Zinnhalogenverbindungen. II. Die Molekül- und Kristallstrukturen von Zinn(IV)-bromid und -iodid". Zeitschrift für Kristallographie – Crystalline Materials.
4. (2001). "Inorganic Chemistry". Academic Press, Elsevier.
5. (1992). "The constitution of aqueous tin(IV) chloride and bromide solutions and solvent extracts studied by ¹¹⁹Sn NMR and vibrational spectroscopy". Polyhedron.
6. (1973). "Preparation, Infrared and Raman Spectra, and Stereochemistries of Pentacoordinate Trimethylphosphine Complexes, MX₄•P(CH₃)₃ and MX₄•P(CD₃)₃ where M = Ge or Sn and X = Cl or Br". Canadian Journal of Chemistry.
7. (1965). "Redistribution and Exchange Reactions in Groups IIB-VIIB". Chemical Reviews.