Tungsten(VI) oxytetrabromide

Tungsten(VI) oxytetrabromide

Identifiers
CAS Number	13520-77-9 [1]  Y[ chemIDplus ]
3D model (JSmol)	Interactive image
ChemSpider	64878725
PubChem CID	139485
CompTox Dashboard (EPA)	DTXSID701306353
InChI InChI=1S/4BrH.O.W/h4*1H;;/q;;;;;+4/p-4 Key: KKUANYDOAOHBGB-UHFFFAOYSA-J InChI=1S/4BrH.O.W/h4*1H;;/q;;;;;+4/p-4
SMILES O=[W](Br)(Br)(Br)Br
Properties
Chemical formula	WOBr4
Molar mass	519.46 g·mol−1
Appearance	red crystals
Density	5.5 g/cm3
Melting point	277 °C (531 °F; 550 K)
Boiling point	327 °C (621 °F; 600 K)
Solubility in water	reacts
Structure
Crystal structure	tetragonal
Related compounds
Other anions	Tungsten(VI) oxytetrafluoride Tungsten(VI) oxytetrachloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y  verify  (what is  YN ?) Infobox references

Tungsten(VI) oxytetrabromide is the inorganic compound with the formula W O Br ₄. This a red-brown, hygroscopic solid sublimes at elevated temperatures. It forms adducts with Lewis bases. The solid consists of weakly associated square pyramidal monomers. ^[2] The related tungsten(VI) oxytetrachloride has been more heavily studied. The compound is usually classified as an oxyhalide.

It can be produced by the reaction of tungsten hexabromide and tungsten trioxide: ^[3]

2 WBr₆ + WO₃ → 3 WOBr₄

References

1. Chambers, Michael. "ChemIDplus - 0013520779 - KKUANYDOAOHBGB-UHFFFAOYSA-J - Tungsten tetrabromide monoxide - Similar structures search, synonyms, formulas, resource links, and other chemical information". chem.nlm.nih.gov.
2. Hess, H.; Hartung, H. (1966). "Die Kristallstruktur von Wolframoxidchlorid WOCl₄ und Wolframoxidbromid WOBr₄". Z. Anorg. Allg. Chem. 34 (3–4): 157–166. doi:10.1002/zaac.19663440306.
3. P.C. Crouch; G.W.A. Fowles; R.A. Walton (1970). "The high yield synthesis of the tungsten (VI) oxyhalides WOCl4, WOBr4 and WO2Cl2 and some observations on tungsten(VI) bromide and tungsten(V) chloride". Journal of Inorganic and Nuclear Chemistry. 32 (1): 329–333. doi:10.1016/0022-1902(70)80475-4.