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]和四水合物[4]的形式存在。其水合物分子为二聚体。[5]
制备
乙酸铕可由乙酸和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
- 2 Eu + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2↑
化学性质
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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