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环戊二烯基锂

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环戊二烯基锂
别名 LiCp
识别
CAS号 16733-97-4  ✓
PubChem 24858115
性质
化学式 C5H5Li
摩尔质量 72.03 g·mol−1
外观 无色固体
密度 1.064 g/cm3
沸点 分解
溶解性 可溶于THF二甲氧基乙烷
危险性
主要危害 可燃
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。

环戊二烯基锂是一种有机锂化合物化学式为C5H5Li。该化合物通常缩写为 LiCp,其中 Cp是环戊二烯基阴离子。纯环戊二烯基锂是一种无色固体,但由于常有痕量氧化杂质,样品通常呈粉红色。

制备、结构和反应

环戊二烯基锂可由THF溶液形式购得。它是通过用正丁基锂环戊二烯混合制备得到: [1]

无溶剂的环戊二烯基锂结晶很少见,其是一种“多层”夹心型错合物,由夹在μ-η5(桥接、哈普托数为5):η5-C5H5(环戊二烯基)配体之间的长链交替 Li+(锂阳离子) 中心组成[2]在胺或醚存在下,环戊二烯基锂可生成错合物,例如(η5-Cp)Li(TMEDA)。[1] 环戊二烯基锂是制备环戊二烯基配合物的常用试剂。

相关条目

参考资料

  1. ^ 1.0 1.1 Reent Michel, Regine Herbst-Irmer, Dietmar Stalke. Revealing Coordination Patterns in C5-Cyclic Lithium Organics. Organometallics. 2011, 30: 4379–4386. doi:10.1021/om200471e. 
  2. ^ Robert E. Dinnebier; Ulrich Behrens; Falk Olbrich. Solid State Structures of Cyclopentadienyllithium, -sodium, and -potassium. Determination by High-Resolution Powder Diffraction. Organometallics. 1997, 16: 3855–3858. doi:10.1021/om9700122. 

 

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环戊二烯基锂
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