(LaCl)(THF)_2(μ-Cl)_4[Li(THF)_2]_2配合物的合成及晶体结构  

SYNTHESIS AND CRYSTAL STRUCTURE OF (LaCl)(THF)_2(μ-Cl)_4 [Li(THF)_2)_2

作　　者：李祥高[1] 刘静芝[1] 金松春[1] 林永华[1] 刘国智[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《无机化学学报》1991年第2期190-195,共6页Chinese Journal of Inorganic Chemistry

摘　　要：LaCl_3和LiCl在THF中于室温反应,以已烷为沉淀剂,在-78℃得到晶体,经色谱、元素分析及X射线晶体结构测定,得到了组成为(LaCl)(THF)_2(μ-Cl)_4[Li(THF)_2]_2的配合物.在约-80℃收集该配合物晶体的衍射强度数据,计算结果表明属于单斜晶系,P2_1/c空间群,其晶胞常数a=10.542(4)(?),b=32.236(14)(?),c=11.182(6)(?);β=113.50(3)°,最后R值为0.0477.四个氯桥键构成了分子的基本骨架,表明桥键在小配体轻希土双金属配合物结构中具有稳定作用.The reaction between LaCl3 and LiCl in THF at room temperature, with hexane as precipitant, has been studied. A crystal was isolated from the solution at -78℃ .The crystal was characterized as a complex with the composition of (LaCl)(THF)2(μ-Cl)4 [Li(THF)2] 2 by gas chromatography, elemental analysis and X-ray diffraction of the single crystal. The diffraction intensities were collected at about -80℃ . The complex belongs to monoclinic space group P21/c with a=10.542(4)A, b = 32.236(14) A, c= 11.182(6)A, β= 113.50 ° (3). The final R value is 0.0477. The basic molecular skeleton of the complex is made of four chloro-bridge bonds, which show the stabilizing function of the bridge bond in structure of bimetallic complexes of light rare earth elements with the small ligands.

关 键 词：THF 镧 锂 配合物 氯 合成 

分 类 号：O614.331[理学—无机化学]