由于镧系收缩和配位不饱和性,导致长期不能合成轻稀土环戊二烯基氯化物。陈文启等借严格控制氯化稀土与环戊二烯基钠的摩尔比为1:0.5,制备了环戊二烯基轻稀土二氯化物(Pr、Ce、Nd),但即使将这一摩尔比调整为1:0.25也不能得到类似的镧的化合物。李毅等以LnCl_3—LiCl(Ln=La、Nd)的四氢呋喃溶液和等摩尔的C_5H_5Na反应,以比较高的收率制备了[Li(THF)_2]_2(μ-Cl)_4C_5Ln·THF,并测定了其晶体结构。我们 Due to lanthanide shrinkage and coordination unsaturation, the light rare earth cyclopentadienyl chloride can not be synthesized for a long time. Chen Wenqi and other strict control by the rare earth chloride and cyclopentadienyl sodium molar ratio of 1: 0.5, prepared cyclopentadienyl light rare earth dichloride (Pr, Ce, Nd), but even if this molar ratio Adjustment to 1: 0.25 also did not give a similar lanthanum compound. Li et al [Li (THF) _2] (μ-Cl) _4C_5Ln · THF with a relatively high yield by the reaction of LnCl_3-LiCl (Ln = La, Nd) in tetrahydrofuran with an equimolar amount of C_5H_5Na The crystal structure was determined. we