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| Names | |
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| IUPAC name
Titanium(III) iodide
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| Other names
Titanium triiodide
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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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
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Titanium(III) fluoride Titanium(III) bromide Titanium(III) chloride |
Other cations
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Zirconium(III) iodide Hafnium(III) iodide |
Related compounds
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Titanium(IV) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.
Preparation and structure
[edit]Titanium(III) iodide can be prepared by reaction of titanium with iodine:[2]
- 2 Ti + 3 I2 → 2 TiI3
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]
References
[edit]- ^ a b Angelkort, Joachim; Schoenleber, Andreas; van Smaalen, Sander (2009). "Low- and High-Temperature Crystal Structures of TiI3". Journal of Solid State Chemistry. 182 (3): 525–53. Bibcode:2009JSSCh.182..525A. doi:10.1016/j.jssc.2008.11.028..
- ^ F. Hein, S. Herzog "Molybdenum(III) Bromide" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1407.
- ^ Catherine E. Housecroft, A. G. Sharpe (2005), Inorganic Chemistry (in German), Pearson Education, p. 601, ISBN 0-13-039913-2