【摘要】 <正> 我们曾报道利用叔丁基环戊二烯基作配体,可分离得到二叔丁基环戊二烯基轻稀土氯化物,并测定了（t-BuCp）₂PrCl·2THF 的分子结构,与此同时,wayda 报道了叔丁基环戊二烯基中、重稀土氯化物的合成,但未能得到这些配合物的结构。本文用叔丁基环戊二烯钠与无水 YbCl₃以2∶1摩尔比在四氢呋喃中反应,分离得到了中性二叔丁基环戊二烯基氯化镱四氢呋喃配合物,并测定了它的 X 光晶体结构。更多还原

【Abstract】 (t-BuCp)₂YbCl.THF was prepared by reaction of YbCl₃ and two equivalent ofsodium tert-butylcyclopentadienide in tetrahydrofuran.This complex crystallizes from THF inmonoclinic space group P2₁/n,with a=0.7726（1）,b=1.2554（2）,c=2.3200（6）nm,β=97.77（2）°,V=2.229nm³,Z=4.The structure was solved by direct method andfourier techniques and refined by leastsquares on the basis of 3156 unique observed reflectionswith I≥3 σ（I）,final R=0.0437.The two ring centroids of the tertbutylcyclopentadienylrings,the chlorine atom and the oxygen atom of the THF form a distorted tetrahedron aroundthe central ion of ytterbium.The average Yb-C bond length is 0.2628（10）nm.Yb--Cl andYb-O distances 0.2537（3）nm and 0.2333（6）nm,respectively.更多还原