稀土季铵盐配合物的研究（Ⅶ）──二硝酸四硫氰酸合铒酸四丁基铵的合成、表征和晶体结构

Studies on Rare Earth Complexes of Quaternary Ammonium Salt(Ⅶ)──Synthesis,Characterization and Structure of Tetrabutylammonium Dinitrato Tetraisothiocyanato Erbiumate

合成了一系列新型稀土季铵盐混合配体配合物，元素分析结果证明其分子式的通式为：Ｃ＿（５２）Ｈ＿（１０８）ＬｎＮ＿９Ｏ＿６Ｓ＿１（Ｌｎ＝Ｅｕ，Ｄｙ，Ｅｒ．Ｙｂ，Ｙ）．研究了该系列配合物的中红外光谱；测定了它们在乙醇溶液中的摩尔电导，证明其属３：１型电解质．用四圆衍射仪测定了铒配合物的晶体结构，属正交晶系，Ｐ＿（ｎｎｎ）空间群，晶胞参数：α＝１．２４７０（７）ｎｍ，ｂ＝１．２９３４（３）ｎｍ，ｃ＝２．１１１２（６）ｎｍ，Ｚ＝２，Ｒ＝０．０６６．中心离子铒被来自２个硝酸根的４个氧原子和４个硫氰酸根的４个氮原子所配位，配位数为８．Ｅｒ—Ｏ键长为０．２３８６ｎｍ；Ｅｒ—Ｎ键长为０．２４５７ｎｍ，饵配位多面体为畸变三角十二面体．

A series of new type mixed ligand complexes were synthesized.The general for-mula was C_(52)H_(108)L4 N_9O_6S_4, Ln=Eu, Dy, Er,Yb,Y.The IR spectra of the complexes werestudied. Their mor conductivity shows they are 3:1 type electrolytes and the ionic crys-tals. The single crystal structure of the title complex was determined by a X-ray analysis.The crystal is rhombic, space group P_(nnn),with unit cell dimensions:a=1.2470(7)nm,b=1.293 4(3)nm,c=2. 1112(6)nm,Z=2,R=0.066.Erbium is coordinated by 4 oxygenatoms of two bidentate nitrate groups, and 4 nitrogen atoms of four thiocyanates,so the oo-ordination number is 8.The bond lengths of Er O and Er Nare 0. 238 6 nm and 0.245 7nm respectively. The polyhedron skeleton around Er3+ is a distorted dodecahedron.