Titanium(III) bromide
Titanium(III) bromide is the inorganic compound with the formula TiBr3. It is a blue black paramagnetic solid with a reddish reflection. It has few applications, although it is a catalyst for the polymerization of alkenes.
| Names | |
|---|---|
| IUPAC name
Titanium(III) bromide | |
| Other names
Titanium tribromide Tribromotitanium | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| Properties | |
| TiBr3 | |
| Molar mass | 287.579 g/mol |
| Appearance | blue-black solid |
| Hazards | |
EU classification (DSD) (outdated) |
not listed |
| NFPA 704 (fire diamond) | |
| Related compounds | |
Other anions |
Titanium(III) chloride Titanium(III) fluoride |
Related compounds |
Titanium(IV) bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Production and structure
TiBr3 can be produced by heating the tetrabromide in an atmosphere of hydrogen:[3]
- 2 TiBr4 + H2 → 2 TiBr3 + 2 HBr
It can also be produced by comproportionation of titanium metal and titanium tetrabromide.[4][5]
- Ti + 3 TiBr4 → 4 TiBr3
Two polymorphs of TiBr3 are known, each exhibiting octahedral Ti centers.[4]
Reactions
Heating the tribromide gives titanium(II) bromide together with the volatile tetrabromide:[3]
- 2 TiBr3 → TiBr4 + TiBr2
The solid dissolves in donor solvents (L) such as pyridine and nitriles to produce 3:1 adducts:
- TiBr3 + 3 L → 2 TiBr3L3
References
- https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=136975
- http://www.webelements.com/compounds/titanium/titanium_tribromide.html
- Sherfey, J. M. (2007). "Titanium(III) Chloride and Titanium(III) Bromide". Inorganic Syntheses. Inorganic Syntheses. 6. pp. 57–61. doi:10.1002/9780470132371.ch17. ISBN 9780470132371.
- Troyanov, S. I.; Rybakov, V. B.; Ionov, V. M. "Preparation and crystal structure of titanium tetrabromide, titanium tribromide and titanium(2+) tetrabromoaluminate(1-)" Zhurnal Neorganicheskoi Khimii 1990, vol. 35, 882-7.
- Stebler, Anton; Leuenberger, Bruno; Gödel, Hans U. (1989). Synthesis and Crystal Growth of A3 M2 X9 (A = Cs, Rb; M = Ti, V, Cr; X = Cl, Br). Inorganic Syntheses. 26. pp. 377–385. doi:10.1002/9780470132579.ch69. ISBN 9780470132579.
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