Rhodium(III) iodide
-iodide-from-xtal-3D-bs-17.png) | |
| Identifiers | |
|---|---|
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.035.913 |
| EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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| Properties | |
| I3Rh | |
| Molar mass | 483.61890 g·mol−1 |
| Hazards | |
| GHS labelling: | |
 | |
| Warning | |
| H413 | |
| P273, P501 | |
| Related compounds | |
Other anions | Rhodium(III) bromide; Rhodium(III) chloride; Rhodium(III) fluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Rhodium(III) iodide is an inorganic compound with the formula RhI3. It is a black solid.[1]
Preparation
[edit]Rhodium(III) iodide can be synthesised by the reaction of aqueous potassium iodide with rhodium(III) bromide.[1]
- RhBr3 + 3KI → RhI3 + 3KBr
Structure
[edit]RhI3 adopts same crystal structure motif as AlCl3 and YCl3. The structure consists of cubic close-packed iodide ions and rhodium ions filling a third of the octahedral interstices, forming a layers.[2]
Reactivity
[edit]Rhodium(III) iodide is only known in the anhydrous form. Unlike the other rhodium(III) halides, it does not form hydrates.[1] The related anion [RhI6]3− was previously thought not to form[1] but has since been prepared by diffusion of RhCl3·3H2O through a layer of hydroiodic acid into piperazine.[3]
References
[edit]- ^ a b c d Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1119–1120. ISBN 978-0-08-037941-8.
- ^ Brodersen, K.; Thiele, G.; Recke, I. (1968). "Strukturuntersuchungen an Rhodiumhalogeniden". J. Less-Common Met. 14 (1): 151–152. doi:10.1016/0022-5088(68)90214-2.
- ^ Bujak, Maciej (2015). "Efficient Diffusion-Controlled Ligand Exchange Crystal Growth of Isostructural Inorganic–Organic Halogenidorhodates(III): The Missing Hexaiodidorhodate(III) Anion". Cryst. Growth Des. 15 (3): 1295–1302. doi:10.1021/cg501694d.