Fang Zhan-Qiang, Zeng Rong-Hua, Li Yan-Ting, Yang Shuo, Song Zhao-Feng
School of Chemistry and the Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2008 Dec 20;65(Pt 1):m118. doi: 10.1107/S1600536808042682.
In the crystal structure of the title complex, Tb(C(6)H(4)NO(2))(C(2)O(4))(H(2)O)(2), the Tb(III) ion is coordinated by two O atoms from two isonicotinate (inic) anions, four O atoms of two oxalate anions, and two water mol-ecules, displaying a distorted square-antiprismatic geometry. The Tb(III) ion, the inic anion and the water mol-ecules occupy general positions. One of the two crystallographically independent oxalate anions is located on a center of inversion, whereas the second is located on the twofold rotation axis. The carboxyl-ate groups of the inic and oxalate anions link the terbium metal centres into layers. These layers are connected by O-H⋯O and N-H⋯O hydrogen bonding into a three-dimensional network.
在标题配合物[Tb(C₆H₄NO₂)(C₂O₄)(H₂O)₂]ₙ的晶体结构中，Tb(III)离子由两个异烟酸根（inic）阴离子中的两个O原子、两个草酸根阴离子的四个O原子以及两个水分子配位，呈现出扭曲的四方反棱柱几何构型。Tb(III)离子、inic阴离子和水分子占据一般位置。两个晶体学独立的草酸根阴离子中的一个位于对称中心，而另一个位于二重旋转轴上。inic和草酸根阴离子的羧酸根基团将铽金属中心连接成层。这些层通过O—H⋯O和N—H⋯O氢键连接成三维网络。
