Tin(IV)_bromide

Tin(IV) bromide
Names
IUPAC name
tetrabromostannate
Other names
tin tetrabromide, stannic bromide, bromostannic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.258 Edit this at Wikidata
EC Number
  • 232-184-5
UNII
  • InChI=1S/4BrH.Sn/h4*1H;/q;;;;+4/p-4 ☒N
    Key: LTSUHJWLSNQKIP-UHFFFAOYSA-J ☒N
  • InChI=1/4BrH.Sn/h4*1H;/q;;;;+4/p-4
    Key: LTSUHJWLSNQKIP-XBHQNQODAB
  • Br[Sn](Br)(Br)Br
Properties
SnBr4
Molar mass 438.33 g/mol
Appearance colourless [1]
Density 3.340 g/cm3 (at 35 °C)[1]
Melting point 31 °C (88 °F; 304 K)[1]
Boiling point 205 °C (401 °F; 478 K)[1]
soluble
−149.0·10−6 cm3/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 [77 °F], 100 kPa).
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Tin(IV) bromide is the chemical compound SnBr4. It is a colourless low melting solid.[1]

Structure

SnBr4 occurs in form of crystals. The compound crystallises in a monoclinic crystal system with molecular SnBr4 units that have distorted tetrahedral geometry,[2] with mean Sn-Br bond lengths of 242.3 pm.[3]

Preparation

SnBr4 can be prepared by reaction of the elements at standard temperature and pressure (STP):[4][page needed]

Sn + 2Br
2 → SnBr
4

Dissolution in solvents

In aqueous solution Sn(H2O)64+[contradictory] 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.[5]

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.[6]

References

  1. ^ a b c d e 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 [Journal of Crystallography - 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 119Sn 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.