Cerium(III) iodide
Chemical compound
From Wikipedia, the free encyclopedia
Cerium(III) iodide (CeI3) is the compound formed by cerium(III) cations and iodide anions.
| Names | |
|---|---|
| IUPAC name
Triiodocerium | |
| Other names
Cerous triiodide, Cerium triiodide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.029.299 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| CeI3 | |
| Molar mass | 520.829 g·mol−1 |
| Appearance | yellow solid[1][2] |
| Melting point | 766 °C,[1] 752 °C[2] |
| soluble[2] | |
| Solubility in acetone | soluble[2] |
| Structure[1][3][4] | |
| PuBr3 | |
| 8-coordinate bicapped trigonal prismatic | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Cerium metal reacts with iodine when heated to form cerium(III) iodide:[2]
- 2 Ce + 3 I2 → 2 CeI3
It is also formed when cerium reacts with mercury(II) iodide at high temperatures:[2]
- 2 Ce + 3 HgI2 → 2 CeI3 + 3 Hg
Structure
Cerium(III) iodide adopts the plutonium(III) bromide crystal structure.[3][4] It contains 8-coordinate bicapped trigonal prismatic Ce3+ ions.[1]
Uses
Cerium(III) iodide is used as a pharmaceutical intermediate[5] and as a starting material for organocerium compounds.[2]