Chemistry:Tin(IV) bromide
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| Names | |
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| IUPAC name
tetrabromostannate
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| Other names
tin tetrabromide, stannic bromide, bromostannic acid
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| Identifiers | |
3D model (JSmol)
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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
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Tin(IV) fluoride Tin(IV) chloride Tin(IV) iodide |
Other cations
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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). | |
 verify (what is   ?)
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| Infobox references | |
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 + 2Br2 → SnBr4
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
- ↑ 1.0 1.1 1.2 1.3 1.4 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" (in de). Acta Crystallographica 16 (6): 446–451. doi:10.1107/S0365110X63001250. https://scripts.iucr.org/cgi-bin/paper?S0365110X63001250.
- ↑ Reuter, H.; Pawlak, R. (2001). "Zinnhalogenverbindungen. II. Die Molekül- und Kristallstrukturen von Zinn(IV)-bromid und -iodid" (in de). Zeitschrift für Kristallographie – Crystalline Materials [Journal of Crystallography - Crystalline Materials] 216: 34–38. doi:10.1524/zkri.216.1.34.18992. https://www.degruyter.com/document/doi/10.1524/zkri.216.1.34.18992/html.
- ↑ Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick (2001). Inorganic Chemistry. Academic Press, Elsevier. ISBN 9780123526519. OCLC 1024925228. https://books.google.com/books?id=Mtth5g59dEIC.
- ↑ 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. https://www.sciencedirect.com/science/article/abs/pii/S0277538700831484.
- ↑ 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. https://cdnsciencepub.com/doi/10.1139/v73-406.
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