Английская Википедия:Europium(II) chloride
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Шаблон:Chembox Europium(II) chloride is an inorganic compound with a chemical formula EuCl2. When it is irradiated by ultraviolet light, it has bright blue fluorescence.[1]
Preparation
Europium dichloride can be produced by reducing europium trichloride with hydrogen gas at high temperature:[2]
- 2 EuCl3 + H2 → 2 EuCl2 + 2 HCl
If dry europium trichloride reacts with lithium borohydride in THF, it can also produce europium dichloride:[3]
- 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.[2] Europium dichloride can react with europium hydride at 120-bar H2, producing EuClH that fluoresces green.[4]
References
Шаблон:Europium compounds Шаблон:Chlorides Шаблон:Lanthanide halides
- ↑ Шаблон:Cite journal
- ↑ 2,0 2,1 Klemm, Wilhelm; Doll, Walter. Measurements on the bivalent and the quadrivalent compounds of the rare earths. VI. The halides of bivalent europium. Zeitschrift für Anorganische und Allgemeine Chemie, 1939. 241: 233–238. Шаблон:ISSN.
- ↑ Rossmanith, K.; Muckenhuber, E. Reaction of rare earth chlorides with lithium borohydride. II. Monatshefte fuer Chemie, 1961. 92: 600–604. Шаблон:ISSN.
- ↑ Шаблон:Cite journal
