Chemistry:Cerium(III) iodide

Cerium(III) iodide
Names
	IUPAC name Triiodocerium
	Other names Cerous triiodide, Cerium triiodide
Identifiers
CAS Number	7790-87-6 ;
3D model (JSmol)	Interactive image;
EC Number	232-228-3;
PubChem CID	123265;
UNII	Z422836G9D ;
	InChI InChI=1S/Ce.3HI/h;3*1H/q+3;;;/p-3 Key: ZEDZJUDTPVFRNB-UHFFFAOYSA-K;
	SMILES I[Ce](I)I;
Properties
Chemical formula	CeI3
Molar mass	520.829 g·mol−1
Appearance	yellow solid
Melting point	766 °C, 752 °C
Solubility in water	soluble
Solubility in acetone	soluble
Structure
Crystal structure	PuBr3
Coordination geometry	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).
	Infobox references

Cerium(III) iodide (CeI₃) is the compound formed by cerium(III) cations and iodide anions.

Preparation

Cerium metal reacts with iodine when heated to form cerium(III) iodide:^[2]

2 Ce + 3 I
2 → 2 CeI
3

It is also formed when cerium reacts with mercury(II) iodide at high temperatures:^[2]

2 Ce + 3 HgI
2 → 2 CeI
3 + 3 Hg

Cerium(III) iodide adopts the plutonium(III) bromide crystal structure.^[3]^[4] It contains 8-coordinate bicapped trigonal prismatic Ce³⁺ ions.^[1]

Cerium(III) iodide is used as a pharmaceutical intermediate^[5] and as a starting material for organocerium compounds.^[2]

↑ ^1.0 ^1.1 ^1.2 ^1.3 Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1240-1241. ISBN 978-0-08-037941-8.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 Imamoto, Tsuneo (15 April 2001). "Cerium(III) Iodide". Encyclopedia of Reagents for Organic Synthesis. John Wiley & Sons, Ltd.. doi:10.1002/047084289X.rc043. ISBN 9780471936237. https://onlinelibrary.wiley.com/doi/abs/10.1002/047084289X.rc043.
↑ ^3.0 ^3.1 Wells, A. F. (1984). Structural Inorganic Chemistry (5th ed.). Oxford University Press. p. 421. ISBN 978-0-19-965763-6.
↑ ^4.0 ^4.1 Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (1964). "Preparation and Crystal Data for Lanthanide and Actinide Triiodides". Inorg. Chem. 3 (8): 1137–1141. doi:10.1021/ic50018a015. https://digital.library.unt.edu/ark:/67531/metadc867868/.
↑ "7790-87-6 - Cerium(III) iodide, ultra dry, 99.9% (REO) - Cerium triiodide - 13641 - Alfa Aesar". https://www.alfa.com/en/catalog/013641/.

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