Chemistry:Europium(III) iodide
| Names | |
|---|---|
| IUPAC name
Europium(III) iodide
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| Other names
Europium triiodide
| |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
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PubChem CID
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| Properties | |
| EuI3 | |
| Molar mass | 532.677 g mol−1 |
| Appearance | colourless crystals[2] |
| Melting point | decomposes [1] |
| Structure[1][3][4] | |
| BiI3 | |
| octahedral | |
| Related compounds | |
Other anions
|
EuF3, EuCl3, EuBr3 |
Other cations
|
SmI3, GdI3 |
Related compounds
|
EuI2 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Europium(III) iodide is an inorganic compound containing europium and iodine with the chemical formula EuI
3.[1]
Preparation
Europium metal reacts directly with iodine to form europium(III) iodide:[5]
- 2 Eu + 3 I
2 → 2 EuI
3
Hydrated europium(III) iodide can be prepared dissolving europium(III) oxide or europium(III) carbonate in hydroiodic acid:[1][6]
- Eu
2O
3 + 6 HI + 6 H
2O → 2 EuI
3 · 9H2O
Europium powder reacts with iodine in THF to form a THF adduct of europium(III) iodide:[7][8]
- 2 Eu + 3 I
2 + 7 THF → [EuI
2(THF)
5][EuI
4(THF)
2]
The adduct can be formulated more simply as EuI
3(THF)
3.5.
Structure
Europium(III) iodide adopts the bismuth(III) iodide (BiI3) crystal structure type,[3][4] with octahedral coordination of each Eu3+ ion by 6 iodide ions.[1]
Reactivity
Europium(III) iodide is used as the starting material for two of the main ways of preparing europium(II) iodide:[9]
Reduction with hydrogen gas at 350 °C:
- 2 EuI
3 + H
2 → 2 EuI
2 + 2 HI
Thermal decomposition[1] at 200 °C, a disproportionation reaction:
- 2 EuI
3 → 2 EuI
2 + 2 I
2
Europium(III) iodide nonahydrate, EuI3·9H2O, thermally decomposes to europium(II) iodide dihydrate, EuI2·H2O.[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1240–1241. ISBN 978-0-08-037941-8.
- ↑ William M. Haynes, ed (2014). CRC Handbook of Chemistry and Physics (95th ed.). CRC Press. p. 4-63. ISBN 978-1482208689.
- ↑ 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/.
- ↑ Holleman, A. F.; Wiberg, E. (2001). Inorganic Chemistry. San Diego: Academic Press. ISBN 0-12-352651-5.
- ↑ Emel'yanov, V. I.; Kuznetsova, L. I.; Abramova, L. V.; Ezhov, A. I. (1997). "Systems Eu2O3-HI-H2O and EuI3-HI-H2O at 25°C". Zh. Neorg. Khim. 42 (8): 1394–1396. https://core.ac.uk/display/289558963.
- ↑ Ortu, Fabrizio (2022). "Rare Earth Starting Materials and Methodologies for Synthetic Chemistry". Chem. Rev. 122: 6040–6116. doi:10.1021/acs.chemrev.1c00842.
- ↑ Gompa, Thaige P.; Rice, Natalie T.; Russo, Dominic R.; Aguirre Quintana, Luis M.; Yik, Brandon J.; Basca, John; La Pierre, Henry S. (2019). "Diethyl ether adducts of trivalent lanthanide iodides". Dalton Trans. 48: 8030–8033. doi:10.1039/C9DT00775J.
- ↑ Brauer, Georg (1975). Handbook of Preparative Inorganic Chemistry. ISBN 3-432-02328-6.
- ↑ Jenden, Charles M.; Lyle, Samuel J. (1982). "A Mössbauer spectroscopic study of the lodides of europium". J. Chem. Soc., Dalton Trans. (12): 2409-2414. doi:10.1039/DT9820002409.
| 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 | |||
 |  |
