复合阴离子稀土穴醚配合物的分子和晶体结构研究  

Crystal and Molecular Structure of a Cryptate H_2Yb(NCS)_3(NO_3)_2·H_2O·(2,2,2)

作　　者：李月军[1] 朱其秀[1] 许振华[1] 徐光宪[1] 韩玉真[2] 马喆生[3] 

机构地区：[1]北京大学化学系,北京100871 [2]北京大学物理化学研究所,北京100871 [3]中国地质大学,北京100083

出　　处：《化学学报》1992年第8期746-751,共6页Acta Chimica Sinica

摘　　要：首次合成了稀土元素镱的异硫氰酸、硝酸复合阴离子穴醚(2,2,2)配合物H_2Yb(NCS)_3(NO_3)(?)H_2O·(2,2,2).测定了它的晶体结构及红外光谱,发现Yb^(3+)没有进入穴醚空穴,它通过H_2O桥以氢键与穴醚的O原子结合.经研究认为,分子中2个H^+结合在穴醚中2个N原子上.与Yb^(a+)配位的异硫氰酸根、硝酸根及水分子形成八配位的三角十二面体几何构型.晶体属单斜晶系,空间群:P2_1/n.A cryptate of the cryptand (2, 2, 2) and the rare earth Ytterbium with multiple anions of NO_3^- and NCS~_ has been synthesized for the first time. The crystal structure has been determined as well as the infrared spectra. The rare earth ion Yb^(3+) is not in the cavity of the cryptand (2, 2, 2) and it is connected with the cryptand (2, 2, 2) through a water bridge by two hydrogen bonda.the two H^(+) in the molecule are mostly bound to the two nitrogen atoms of the cryptand (2, 2, 2). The coordinate NO_3^-, NCS^-and H_2O to the Yb^(3+) compose a dodecahedron. The crystal is monoclinic and space group P2_1/n.

关 键 词：穴醚 稀土配合物 晶体结构 

分 类 号：O614.33[理学—无机化学]