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乙酸铕

乙酸铕
别名 醋酸铕
识别
CAS号 1184-63-0  checkY
性质
化学式 Eu(CH3COO)3
外观 固体
熔点 70 °C(四水,分解)
280 °C(无水,分解)[1]
溶解性 可溶
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

乙酸铕是铕的乙酸盐,化学式为Eu(CH3COO)3,可以以无水物倍半水合物[2][3]四水合物[4]的形式存在。其水合物分子为二聚体。[5]

制备

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乙酸铕可由乙酸氧化铕在加热的条件下搅拌反应,加水稀释后结晶得到:[6]

Eu2O3 + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2O

金属也能直接参与反应:[3]

2 Eu + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2

化学性质

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将乙酸铕溶解在水中,用乙酸酸化,通过电化学还原法可以得到二价铕的化合物[Eu(CH3COO)2(CH3COOH)(H2O)2]。[7]

乙酸铕在过量的冰乙酸中结晶,可以得到酸式盐[Eu(H(CH3COO)2)3](H2O)。[3]

乙酸盐受热可以分解,水合物先失水得到无水物,然后经过碱式乙酸盐EuOCH3COO、碱式碳酸盐Eu2O2CO3,最终得到氧化铕[1]

参考文献

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  1. ^ 1.0 1.1 Ogawa M, Manabe K. Thermal Decomposition of Europium (III) Acetate Tetrahydrate页面存档备份,存于互联网档案馆)(酢酸ユウロピウム(Ⅲ)4水和物の熱分解). Journal of the Ceramic Society of Japan, 1988, 96 (9): 890-893. doi:10.2109/jcersj.96.890
  2. ^ 注释:含有1.5个结晶水的水合物是倍半水合物,对于乙酸铕,其结构为[Eu2(CH3COO)6(H2O)](H2O)2
  3. ^ 3.0 3.1 3.2 Sonia Gomez Torres, Ingo Pantenburg, Gerd Meyer. 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. 2006, 632 (12-13): 1989–1994 [2019-02-01]. ISSN 1521-3749. doi:10.1002/zaac.200600154. (原始内容存档于2022-05-16) (英语). 
  4. ^ Herbert N. McCoy. The Salts of Europium. Journal of the American Chemical Society. 1939-09-01, 61 (9): 2455–2456 [2019-02-01]. ISSN 0002-7863. doi:10.1021/ja01878a055. 
  5. ^ Cameron J. Kepert, Lu Wei-Min, Peter C. Junk, Brian W. Skelton, Allan H. White. Structural Systematics of Rare Earth Complexes. X (‘Maximally’) Hydrated Rare Earth Acetates. Australian Journal of Chemistry. 1999, 52 (6): 437 [2020-01-18]. ISSN 0004-9425. doi:10.1071/CH98041 (英语). 
  6. ^ 唐慧安,刘艳芝,赵爱萍. 一种醋酸铕的合成方法:, CN104387254A[P]. 2015.
  7. ^ P. Starynowicz. Structure and spectroscopy of diaqua(μ3-acetato)(acetato-O)(acetic acid-O)europium(II), [Eu(OAc)2(AcOH)(H2O)2]. Polyhedron. 1995-12-01, 14 (23): 3573–3577 [2019-02-01]. ISSN 0277-5387. doi:10.1016/0277-5387(95)00174-Q. 
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乙酸铕
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