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Tin(IV) bromide

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Tin(IV) bromide
Names
IUPAC name tetrabromostannate
Other names tin tetrabromide, stannic bromide, bromostannic acid
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.258 Edit this at Wikidata
EC Number
  • 232-184-5
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/4BrH.Sn/h4*1H;/q;;;;+4/p-4Key: LTSUHJWLSNQKIP-UHFFFAOYSA-J
  • InChI=1/4BrH.Sn/h4*1H;/q;;;;+4/p-4Key: LTSUHJWLSNQKIP-XBHQNQODAB
SMILES
  • Br(Br)(Br)Br
Properties
Chemical formula SnBr4
Molar mass 438.33 g/mol
Appearance colourless
Density 3.340 g/cm (at 35 °C)
Melting point 31 °C (88 °F; 304 K)
Boiling point 205 °C (401 °F; 478 K)
Solubility in water soluble
Magnetic susceptibility (χ) −149.0·10 cm/mol
Related compounds
Other anions Tin(IV) fluoride
Tin(IV) chloride
Tin(IV) iodide
Other cations Carbon tetrabromide
Silicon tetrabromide
Germanium tetrabromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

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, with mean Sn-Br bond lengths of 242.3 pm.

Preparation

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

Sn + 2Br
2 → SnBr
4

Dissolution in solvents

In aqueous solution SnBr4 dissolves to give a series of octahedral (six-ligated) bromo-aquo complexes. These include SnBr4(H2O)2 and cis- and trans-[SnBr2(H2O)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.

References

  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. Brand, P.; Sackmann, H. (1963). "Die Kristallstruktur von SnBr4" [The crystal structure of SnBr4]. Acta Crystallographica (in German). 16 (6): 446–451. Bibcode:1963AcCry..16..446B. doi:10.1107/S0365110X63001250.
  3. Reuter, H.; Pawlak, R. (2001). "Zinnhalogenverbindungen. II. Die Molekül- und Kristallstrukturen von Zinn(IV)-bromid und -iodid" [Tin halogen compounds. II. The Molecular and Crystal Structures of Tin(IV) Bromide and Tin(IV) Iodide]. Zeitschrift für Kristallographie – Crystalline Materials (in German). 216 (1–2001): 34–38. Bibcode:2001ZK....216...34R. doi:10.1524/zkri.216.1.34.18992. S2CID 94609783.
  4. Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick (2001). Inorganic Chemistry. Academic Press, Elsevier. ISBN 978-0-12-352651-9. OCLC 1024925228.
  5. Taylor, M. J.; Coddington, J. M. (1992). "The constitution of aqueous tin(IV) chloride and bromide solutions and solvent extracts studied by Sn NMR and vibrational spectroscopy". Polyhedron. 11 (12): 1531–1544. doi:10.1016/S0277-5387(00)83148-4.
  6. Frieson, D. K.; Ozin, G. A. (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. 51 (16): 2697–2709. doi:10.1139/v73-406.
Tin compounds
Sn(II)
Sn(IV)
Bromine compounds
Br(−I)
Br(−I,I)
Br(I)
Br(II)
Br(I,V)
Br(III)
Br(IV)
Br(V)
Br(VII)
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