高氯酸四(DL-a-缬氨酸)八水合二钐的合成和结构  

SYNTHESIS AND CRYSTAL STRUCTURE OF [Sm_2(Val)_4(H_2O)_8]6ClO_4

作　　者：马爱增[1] 李来明[1] 林永华[1] 金松春[1] 席时权[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：《应用化学》1993年第4期110-113,共4页Chinese Journal of Applied Chemistry

摘　　要：α-氨基酸在人体有极为重要的生理作用,近年来人们对其稀土配合物进行了广泛的研究。进一步研究稀土氨基酸配合物的单晶结构对于探讨稀土离子与生物体的作用是很有意义的。将高氯酸钐溶液与生化试剂DL-a-缬氨酸以1:1摩尔比混合,在75℃水浴中反应6小时,加热浓缩后,室温下缓慢挥发,即得到浅黄色透明棱状晶体。The title complex has been synthesized and characterized by FT-IR spectrometry. The crystal of the complex, determined by X-ray diffraction method, belongs to orthorhombic with space group Pnn2 and cell parameters a=1. 4433(1)nm, b=2. 0169(3)nm, c=1. 8489(2)nm and Z=4.The two Sm ions are connected by four carboxyl groups forming a dinuclear complex. Four water molecules are coordinated to cach Sm ion in this dinuclear complex. Therefore, there are 8 oxygen atoms coordinated to each Sm ion assuming a bicapped trigonal prism. The N atoms of NH_3^+ groups in the complex does not coordinate to Smions. The two Sm ions are spaced in 0. 4443nm, thus no metalmetal bonds could be formed in the complex.

关 键 词：稀土 氨基酸 配合物 晶体结构 

分 类 号：O743.53[理学—晶体学]