Rhodium(III) iodide

Rhodium(III) iodide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.913 Edit this at Wikidata
EC Number
  • 239-521-5
  • InChI=1S/3HI.Rh/h3*1H;/q;;;+3/p-3
    Key: KXAHUXSHRWNTOD-UHFFFAOYSA-K
  • [Rh](I)(I)I
Properties
I3Rh
Molar mass 483.61890 g·mol−1
Hazards
GHS labelling:
GHS09: Environmental hazard
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

Rhodium(III) iodide can be synthesised by the reaction of aqueous potassium iodide with rhodium(III) bromide.[1]

RhBr3 + 3KI → RhI3 + 3KBr

Structure

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

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

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.


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