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Names | |
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IUPAC name Titanium(III) iodide | |
Other names Titanium triiodide | |
Identifiers | |
3D model (JSmol) | |
PubChem CID | |
CompTox Dashboard (EPA) | |
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Properties | |
I3Ti | |
Molar mass | 428.580 g·mol−1 |
Appearance | black-violet solid |
Density | 4.96 g·cm−3 [1] |
Related compounds | |
Other anions | Titanium(III) fluoride Titanium(III) bromide Titanium(III) chloride |
Other cations | Zirconium(III) iodide Hafnium(III) iodide |
Related compounds | Titanium(IV) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Titanium(III) iodide is an inorganic compound with the formula TiI3. It is a dark violet solid that is insoluble in solvents, except upon decomposition.
Titanium(III) iodide can be prepared by reaction of titanium with iodine: [2]
It can also be obtained by reduction of TiI4, e.g., with aluminium. [3]
In terms of its structure, the compound exists as a polymer of face-sharing octahedra. Above 323 K, the Ti---Ti spacings are equal, but below that temperature, the material undergoes a phase transition. In the low temperature phase, the Ti---Ti contacts are alternating short and long. The low temperature structure is similar to that of molybdenum tribromide. [1]