Europium(II) chloride is an inorganic compound with a chemical formula EuCl2. When it is irradiated by ultraviolet light, it has bright blue fluorescence.[3]
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Other names Europium dichloride | |
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3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.033.973 |
EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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Properties | |
Cl2Eu | |
Molar mass | 222.86 g·mol−1 |
Appearance | white solid |
Density | 4.86 g·cm−3[1] |
Melting point | 738 °C (1,011 K)[2] |
Boiling point | 2,190 °C (2,460 K)[2] |
Related compounds | |
Other anions | europium difluoride europium dibromide europium diiodide |
Other cations | samarium dichloride thulium dichloride |
Related compounds | europium trichloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Preparation
Europium dichloride can be produced by reducing europium trichloride with hydrogen gas at high temperature:[4]
- 2 EuCl3 + H2 → 2 EuCl2 + 2 HCl
If dry europium trichloride reacts with lithium borohydride in THF, it can also produce europium dichloride:[5]
- 2 EuCl3 + 2 LiBH4 → 2 EuCl2 + 2 LiCl + H2↑ + B2H6↑
Properties
Europium dichloride can form yellow ammonia complexes:EuCl2•8NH3, and can dissolve to pale yellowish EuCl2•NH3.[4] Europium dichloride can react with europium hydride at 120-bar H2, producing EuClH that fluoresces green.[6]
References
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