Zirconium(III) iodide
Names | |
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IUPAC name
Zirconium triiodide
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Identifiers | |
3D model (
JSmol ) |
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PubChem CID
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Properties | |
I3Zr | |
Molar mass | 471.937 g·mol−1 |
Appearance | dark blue crystals[1] |
Melting point | 727 °C (1,341 °F; 1,000 K) |
Structure | |
Orthorhombic | |
Pmmn, No. 59 | |
a = 12.594 Å, b = 6.679 Å, c = 7.292 Å
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Related compounds | |
Other anions
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Zirconium(III) chloride Zirconium(III) bromide |
Other cations
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Titanium(III) iodide Hafnium(III) iodide |
Related compounds
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Zirconium(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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Zirconium(III) iodide is an inorganic compound with the formula ZrI3.
Preparation
Like other group 4 trihalides, zirconium(III) iodide can be prepared from zirconium(IV) iodide by high-temperature reduction with zirconium metal, although incomplete reaction and contamination of the product with excess metal often occurs.[2]
- 3 ZrI4 + Zr → 4 ZrI3
An alternative is to crystallise zirconium(III) iodide from a solution of zirconium(III) in
Structure and bonding
Zirconium(III) iodide has a lower magnetic moment than is expected for the d1 metal ion Zr3+, indicating non-negligible Zr–Zr bonding.[2]
The
ZrCl3, ZrBr3 and ZrI3 adopt structures very similar to the β-TiCl3 structure.[2] In all three ZrX3 there is some elongation of the octahedra along the metal-metal axis, partly due to metal-metal repulsion,[4] but the elongation is most pronounced in the chloride, moderate in the bromide and negligible in the iodide.[4]
References
- ISBN 978-1466571143.
- ^ ISBN 978-0-08-037941-8.
- .
- ^ .
- ISBN 978-0-19-965763-6.
- .