中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (4): 42-45.

• 研究论文 • 上一篇    下一篇

硝酸镨、钕、钐与12-冠-4配合物的晶体结构

于凤兰, 金钟声, 胡宁海, 倪嘉缵   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1987-04-24 修回日期:1987-09-04 出版日期:1988-08-10 发布日期:1988-08-10

CRYSTAL STRUCTURES OF THE COMPLEXES OF 12-CROWN-4 WITH PRASEODYMIUM NITRATE,NEODYMIUM NITRATE AND SAMARIUM NITRATE

Yu Fenglan, Jin Zhongsheng, Hu Ninghai, Ni Jiazuan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1987-04-24 Revised:1987-09-04 Published:1988-08-10 Online:1988-08-10

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摘要： 合成了三种标题化合物LnC8H16N3O13(In=Pr,Nd,Sm)。并用单晶X射线衍射法测定了它们的晶体与分子结构。它们均属单斜晶系,空间群为P21/c,Z=4。晶胞参数为:a=12.160(4)[12.153(4),12.122(4)]**。b=8.549(3)[8.562(2),8.550(4)],c=15.435(2)[15.376(3),15.293(6)]Å,β=92.55(2)[92.22(2),91.77(3)]°,结构用Patterson函数法与Fourier迭代法解出,并用最小二乘法修正,最后的R值为0.032[0.067,0.068]。Ln3+离子跟三个双齿配位体的硝酸根及冠醚环上的四个氧原子键合,形成十配位的化合物。Ln-O的距离在2.49～2.62[2.47～2.62,2.44～2.58]Å范围之内,平均值为2.54[2.53,2.51]Å。

关键词: 晶体结构, 稀土硝酸盐与冠醚的配合物

Abstract: The crystal structures of the title compounds were determined by single crystal X-ray diffraction. The complexes all crystallize in the monoclinic space group P21/c, with Z=4. Lattice parameters are, a=12.160(4)[12.153(4), 12.122(4)]**,b=8.549(3)[8.562(2), 8.550(4)], c=15.425(2)[l5.376(3), 15.293(6)]Å, β=92.55(2)[92.22(2), 91.77(3)]°. The structures were solved by Patterson and Fourier techniques and refined by leastsquares to R=0.032 [0.067, 0.067]. The Ln (Ⅲ) ions (Ln=Pr, Nb, Sm) are 10-coordinated, being bonded to three bidentate nitrate groups and to the four oxygen atoms of the crown ether. The Ln-O distances are in the range 2.49-2.62[2.47-2.62,2.44-2.58]Å(average:2.54[2.53, 2.51]Å).

Key words: Crystall strueture, Complexes of crown ether with rare earth nitralte

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