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.
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| IUPAC name
Titanium(III) bromide
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| Other names
Titanium tribromide
Tribromotitanium | |
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| TiBr3 | |
| Molar mass | 287.579 g/mol |
| Appearance | blue-black solid |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Related compounds | |
Other anions
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Titanium(III) chloride Titanium(III) fluoride |
Related compounds
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Titanium(IV) bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Production and structure
editTiBr3 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
editHeating 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 → TiBr3L3
References
edit- ^ "Titanium(III) bromide".
- ^ "WebElements Periodic Table » Titanium » titanium tribromide".
- ^ a b Sherfey, J. M. (1960). "Titanium(III) Chloride and Titanium(III) Bromide". Inorganic Syntheses. Vol. 6. pp. 57–61. doi:10.1002/9780470132371.ch17. ISBN 978-0-470-13237-1.
- ^ a b 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; Güdel, Hans U. (1989). "Synthesis and Crystal Growth of A 3 M 2 X 9 (A = Cs, Rb; M = Ti, V, Cr; X = Cl, Br)". Inorganic Syntheses. Vol. 26. pp. 377–385. doi:10.1002/9780470132579.ch69. ISBN 978-0-470-13257-9.