Nie Xiao-Yan, Li Qian-Zhu
Department of Chemistry, Bijie University, Bijie, Guiyang 551700, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2009 Feb 25;65(Pt 3):m328-9. doi: 10.1107/S1600536809005947.
The asymmetric unit of the title compound, {[AgNd(C(6)H(4)NO(2))(2)(C(2)O(4))]·2H(2)O}(n), contains one Nd(III) atom, one Ag(I) atom, one oxalate ligand, two nicotinate ligands and two uncoordinated water mol-ecules. The Nd(III) atom is eight-coordinated in a distorted square-anti-prismatic coordination geometry by four O atoms from two oxalate ligands and four O atoms from four nicotinate ligands. The Ag(I) atom has a T-shaped configuration, defined by two N atoms from two nicotinate ligands and one O atom from one oxalate ligand. The nicotinate and oxalate ligands link the Nd and Ag atoms into a three-dimensional coordination framework. O-H⋯O and O-H⋯N hydrogen bonds donated by water mol-ecules are observed in the crystal.
标题化合物{[AgNd(C₆H₄NO₂)₂(C₂O₄)]·2H₂O}ₙ的不对称单元包含一个Nd(III)原子、一个Ag(I)原子、一个草酸根配体、两个烟酸根配体和两个未配位的水分子。Nd(III)原子由来自两个草酸根配体的四个O原子和来自四个烟酸根配体的四个O原子以扭曲的四方反棱柱配位几何构型进行八配位。Ag(I)原子具有T形构型，由来自两个烟酸根配体的两个N原子和来自一个草酸根配体的一个O原子确定。烟酸根和草酸根配体将Nd和Ag原子连接成三维配位框架。在晶体中观察到由水分子提供的O—H⋯O和O—H⋯N氢键。
