摘要
双(茚基)镱(Ⅱ)四氢呋喃配合物(η~5-C_9H_7)_2Yb(THF)_2的晶体属单斜晶系,C_c空间群,晶体学参数a=13.506(4),b=11.081(2),c=15.577(5),β=92.68(3)°,V=2329(1),D_c=1.56g/cm^3,Z=4,μ=42.4cm^(-1),F(000)=1088,最终编离因子R=0.029,R_w=0.031。中心离子Yb^(2+)与两个茚基以η~5形式成键且与两个四氢呋喃中的氧成键,茚基的两个质心和四氢呋喃中的两个氧形成扭曲的四面体,Yb^(2+)在四面体的中心。Yb^(2+)的配位数为8。Yb^(2+)到质心In1的距离为2.52,到质心In2的距离为2.40。Yb^(2+)到O(1)的键长为2.356(7),到O(2)的键长为2.417(5)。
The crystal of (η5-C9H7)2Yb(THF)2 belongs to monoclinic, space group Cc with a=13. 506 (4),b= 11. 081 (2), c=15. 577(5)A,β=92. 68(3)°,V = 2329(1)A3,Dc = 1.56g/cm3,Z= 4,β= 42. 4cm-1,F(000) = 1088. The final R = 0. 029, Rw = 0, 031. The central Yb is bonded to two indenyl in η5-fashion and two oxygen atoms of THF, respectively. The two centroids of in-denyls and two oxygen atoms of THF form a distorted tetrahedron around the central ion ytterbium (Ⅱ). The coordination number of Yb2+ is 8. The distance of the Yb to centroid(l) of indenyl is 2. 52 A, and that of Yb to centroid(2) of indenyl is 2. 40A. The bond length Yb -O (1) is 2. 34 A, and the Yb-O(2) is 2. 42A.
