Tin(IV) bromide
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Names | |
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IUPAC name tetrabromostannate | |
Other names tin tetrabromide, stannic bromide, bromostannic acid | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.029.258 |
EC Number |
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PubChem CID | |
UNII | |
CompTox Dashboard (EPA) | |
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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). |
Tin(IV) bromide is the chemical compound SnBr4. It is a colourless low melting solid.[1]
Structure
[edit]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
[edit]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
[edit]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
[edit]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
[edit]- ^ 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.
- ^ 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.
- ^ 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.
- ^ Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick (2001). Inorganic Chemistry. Academic Press, Elsevier. ISBN 978-0-12-352651-9. OCLC 1024925228.
- ^ 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.
- ^ 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.