Europium acetate is a inorganic salt of europium and acetic acid with the chemical formula of Eu(CH3COO)3. In this compound, europium exhibits the +3 oxidation state. It can exist in the form of anhydrous, sesquihydrate and tetrahydrate. Its hydrate molecule is a dimer.[1]
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| Names | |
|---|---|
| Other names
Europium(III) acetate
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| Identifiers | |
| ECHA InfoCard | 100.013.337 |
CompTox Dashboard (EPA)
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| Properties | |
| Eu(CH3COO)3 | |
| Appearance | white solid |
| soluble in water | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Europium acetate can be obtained by stirring reaction of acetic acid and europium oxide under heating, and then diluting with water and crystallizing:
- Eu2O3 + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2O
Europium can also directly participate in the reaction:[2]
- 2 Eu + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2↑
Chemical properties
It can be dissolved in water, acidified with acetic acid, and the compound of divalent europium [Eu(CH3COO)2(CH3COOH)(H2O)2] can be obtained by electrochemical reduction.
Europium acetate can be crystallized in excess glacial acetic acid to give the salt [Eu(H(CH3COO)2)3](H2O).[2]
Europium acetate can be decomposed by heating, and the hydrate first loses water to obtain anhydrous, and then passes through basic acetate EuOCH3COO, basic carbonate Eu2O2CO3, and finally obtains europium oxide.
References
- ^ P. Starynowicz (1995-12-01). "Structure and spectroscopy of diaqua(μ3-acetato)(acetato-O)(acetic acid-O)europium(II), [Eu(OAc)2(AcOH)(H2O)2]". Polyhedron. 14 (23): 3573–3577. doi:10.1016/0277-5387(95)00174-Q. ISSN 0277-5387. Retrieved 2019-02-01.
- ^ a b Sonia Gomez Torres, Ingo Pantenburg, Gerd Meyer (2006). "Direct Oxidation of Europium Metal with Acetic Acid: Anhydrous Europium(III) Acetate, Eu(OAc)3, its Sesqui-hydrate, Eu(OAc)3(H2O)1.5, and the "Hydrogendiacetate", [Eu(H(OAc)2)3](H2O)". Zeitschrift für anorganische und allgemeine Chemie. 632 (12–13): 1989–1994. doi:10.1002/zaac.200600154. ISSN 1521-3749. Retrieved 2019-02-01.
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