稀土离子具有特殊高的配位数和4f 轨道,这些结构的特点将可能使它们在有机合成或催化反应中显示一些独特的性能。事实上已经发现在催化共轭双烯定向聚合时,稀土配位络合催化剂具有一般钛、钴、镍、锂等催化剂所没有 Rare earth ions have particularly high coordination numbers and 4f orbitals, and the characteristics of these structures will likely make them show some unique properties in organic synthesis or catalysis. In fact, it has been found that the rare earth coordination complex catalysts have generally not been available for catalysts such as titanium, cobalt, nickel, lithium, etc., in the directional polymerization of conjugated dienes,