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三茂铈

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三茂铈
别名 三(环戊二烯基)铈
识别
CAS号 1298-53-9  ✓
SMILES
性质
化学式 Ce(C5H5)3
摩尔质量 335.401 g·mol⁻¹
外观 橘红色固体[1]
熔点 435℃(熔化时略有分解)
沸点 230℃
(10-3~10-4mmHg,升华)
相关物质
相关化学品 环戊二烯
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。

三茂铈金属有机化合物,化学式为Ce(C5H5)3,在干燥空气中是镧系金属环戊二烯配合物中最不稳定的。

三茂铈和一般过渡金属的环戊二烯配合物不同,被认为是离子型键合。[1]

制备

三茂铈可在四氢呋喃介质中,用无水氯化铈环戊二烯钠反应得到:[1]

3C5H5Na + CeCl3 → (C5H5)3Ce+ 3 NaCl

化学性质

三茂铈遇水分解,生成氢氧化铈环戊二烯

相关化合物

有文献报道了四价铈的化合物Ce(C5H5)4的合成[2]及性质[3],但被指出其合成方法并不可信。[4][5]

参考资料

  1. ^ 1.0 1.1 1.2 《无机化学丛书》. 第七卷 钪 稀土元素. 易宪武 等主编. 科学出版社. 2.3.7 稀土元素有机化合物. P260~261. 1.π络合物
  2. ^ B.L. Kalsotra, S.P. Anand, R.K. Multani, B.D. Jain. Tetracyclopentadienyl and tetraindenyl compounds of cerium(IV). Journal of Organometallic Chemistry. 1971-04, 28 (1): 87–89 [2019-12-19]. doi:10.1016/S0022-328X(00)81578-8. (原始内容存档于2018-06-29) (英语). 
  3. ^ 任镜清, 徐光宪. 四茂铈(Ce(C5H5)4)的电子结构和化学键[J]. 科学通报, 1985(19):23-28.
  4. ^ G.B. Deacon, T.D. Tuong, D.G. Vince. Refutation of the synthesis of tetrakis(cyclopentadienyl)cerium(IV). Polyhedron. 1983-01, 2 (9): 969–970 [2019-12-19]. doi:10.1016/S0277-5387(00)81419-9. (原始内容存档于2018-06-01) (英语). 
  5. ^ Reiner Anwander, Michael Dolg, Frank T. Edelmann. The difficult search for organocerium( iv ) compounds. Chemical Society Reviews. 2017, 46 (22): 6697–6709 [2019-12-19]. ISSN 0306-0012. doi:10.1039/C7CS00147A (英语). 
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三茂铈
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