Cerium(III) iodide

Cerium(III) iodide  Names

IUPAC name

Triiodocerium

Other names

Cerous triiodide, Cerium triiodide

Identifiers

CAS Number

* 7790-87-6 Y

3D model (JSmol)

* Interactive image

EC Number |

* 232-228-3

PubChem CID

* 123265

UNII |

* Z422836G9D Y

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[1][2]
Melting point | 766 °C,[1] 752 °C[2]

Solubility in water

| soluble[2]
Solubility in acetone | soluble[2]
Structure[1][3][4]

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.

## Contents

* 1 Preparation
* 2 Structure
* 3 Uses
* 4 References

## Preparation

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

2 Ce + 3 I
2 → 2 CeI

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

## 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]

## References

1. ↑ 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. ↑ 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. ↑ 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. ↑ 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/.
5. ↑ "7790-87-6 - Cerium(III) iodide, ultra dry, 99.9% (REO) - Cerium triiodide - 13641 - Alfa Aesar". https://www.alfa.com/en/catalog/013641/.

* v
* t
* e

Cerium compounds

Cerium(III)|

* CeBr3
* Ce2(CO3)3
* CeCl3
* CeF3
* CeI3
* Ce(OH)3
* Ce2O3
* Ce2(SO4)3
* Ce(NO3)3

| Organocerium(III)|

* Ce(acac)3
* Ce2(C2O4)3
* Ce(CH3SO3)3

|

Cerium(III,IV)|

* Ce3O4

Cerium(IV)|

* (NH4)4Ce(SO4)4•2 H2O
* (NH4)2Ce(NO3)6
* CeB6
* Ce(NO3)4
* CeO2
* Ce(SO4)2

HI |  |  |  | He

|
|
|
|

LiI | BeI2 | BI3 | CI4 | NI3 | I2O4,
I2O5,
I4O9 | IF,
IF3,
IF5,
IF7 | Ne
NaI | MgI2 | AlI3 | SiI4 | PI3,
P2I4 | S  | ICl,
ICl3 | Ar
KI | CaI2 | Sc  | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2,
GeI4 | AsI3 | Se  | IBr | Kr
RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo  | Tc  | Ru  | Rh  | Pd  | AgI | CdI2 | InI3 | SnI4,
SnI2 | SbI3 | TeI4 | I  | Xe
CsI | BaI2 |  | HfI4 | TaI5 | W  | Re  | Os  | Ir  | Pt  | AuI | Hg2I2,
HgI2 | TlI | PbI2 | BiI3 | Po  | AtI | Rn
Fr  | RaI2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
La  | Ce  | Pr  | Nd  | Pm  | SmI2 | Eu  | Gd  | TbI3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac  | ThI4 | Pa  | UI3,
UI4 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | EsI3 | Fm  | Md  | No  | Lr

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