Tin(IV) bromide explained
Tin(IV) bromide is the chemical compound SnBr4. It is a colourless low melting solid.
Structure
SnBr4 occurs in form of crystals. The compound crystallises in a monoclinic crystal system with molecular SnBr4 units that have distorted tetrahedral geometry,[1] with mean Sn-Br bond lengths of 242.3 pm.[2]
Preparation
SnBr4 can be prepared by reaction of the elements at standard temperature and pressure (STP):[3]
+ 2 →
Dissolution in solvents
In aqueous solution Sn(H2O)64+ is the principal ionic species amongst a range of 6 coordinate ions with from 0-6 bromide ligands (e.g. Sn(H2O)64+, SnBr(H2O)53+). In basic solution the Sn(OH)62− ion is present.[4]
Reactions
SnBr4 forms 1:1 and 1:2 complexes with ligands, e.g. with trimethylphosphine the following can be produced, SnBr4.P(CH3)3 and SnBr4.2P(CH3)3.[5]
Notes and References
- Die Kristallstruktur von SnBr4 . de . The crystal structure of SnBr4 . P. . Brand . H. . Sackmann . . 1963 . 16 . 6 . 446–451 . 10.1107/S0365110X63001250 . 1963AcCry..16..446B .
- Zinnhalogenverbindungen. II. Die Molekül- und Kristallstrukturen von Zinn(IV)-bromid und -iodid . H. . Reuter . R. . Pawlak . de . Tin halogen compounds. II. The Molecular and Crystal Structures of Tin(IV) Bromide and Tin(IV) Iodide . Zeitschrift für Kristallographie – Crystalline Materials [Journal of Crystallography - Crystalline Materials] . 2001 . 216 . 1–2001 . 34–38 . 10.1524/zkri.216.1.34.18992 . 2001ZK....216...34R . 94609783 .
- Book: Egon . Wiberg . Nils . Wiberg . Arnold Frederick . Holleman . Inorganic Chemistry . 2001 . Academic Press, Elsevier . 978-0-12-352651-9 . 1024925228.
- Taylor . M. J. . Coddington . J. M.. The constitution of aqueous tin(IV) chloride and bromide solutions and solvent extracts studied by 119Sn NMR and vibrational spectroscopy. Polyhedron. 11. 12. 1531–1544. 1992. 10.1016/S0277-5387(00)83148-4.
- Frieson . D. K. . Ozin . G. A.. 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. 51. 16. 2697–2709. 1973. 10.1139/v73-406 .
