Titanium(III) iodide
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| Identifiers | |
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| Properties | |
| I3Ti | |
| Molar mass | 428.58 g·mol−1 |
| Appearance | black-violet solid |
| Density | 4.96 g·cm−3 |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
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:
It can also be obtained by reduction of TiI4, e.g., with aluminium .
In terms of its structure, the compound exists as a polymer of face-sharing octahedra. Above 323 K, the Ti---Ti spacing 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.
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