Tin(IV) bromide

Tin(IV) bromide
Names
	IUPAC name tetrabromostannate
	Other names tin tetrabromide, stannic bromide, bromostannic acid
Identifiers
CAS Number	7789-67-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	23018 ;
ECHA InfoCard	100.029.258
EC Number	232-184-5;
PubChem CID	24616;
UNII	23C21BW281 ;
CompTox Dashboard (EPA)	DTXSID1064873 ;
	InChI InChI=1S/4BrH.Sn/h41H;/q;;;;+4/p-4 Key: LTSUHJWLSNQKIP-UHFFFAOYSA-J ; InChI=1/4BrH.Sn/h41H;/q;;;;+4/p-4 Key: LTSUHJWLSNQKIP-XBHQNQODAB;
	SMILES Br[Sn](Br)(Br)Br;
Properties
Chemical formula	SnBr4
Molar mass	438.33 g/mol
Appearance	colourless
Density	3.340 g/cm3 (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)	−149.0·10−6 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). verify (what is ?) 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 + 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]²⁺.^[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

^ ^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.

[Greenwood-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 [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.

[Holleman-Wiberg2001-4] 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.

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