Zhao Ling-Zhi, He Rui-Xia, Zhong Qiu-Gui, Zeng Rong-Hua, Lu Dong-Sheng
Acta Crystallogr Sect E Struct Rep Online. 2009 Jul 31;65(Pt 8):m1018-9. doi: 10.1107/S1600536809029742.
The asymmetric unit of the title complex, {[AgEr(C(5)H(3)N(2)O(2))(2)(C(2)O(4))]·H(2)O}(n), contains one Er(III) atom, one Ag(I) atom, two pyrazine-2-carboxyl-ate (pyc) ligands, two half oxalate ligands (each lying on an inversion center) and one uncoordinated water mol-ecule. The Er(III) atom is coordinated by two O atoms and two N atoms from two pyc ligands, one O atom from a third pyc ligand and four O atoms from two oxalate ligands in a distorted monocapped square-anti-prismatic geometry. The Ag(I) atom is coordinated by two N atoms from two pyc ligands, one O atom from a third pyc ligand and one O atom from one oxalate ligand. The crystal structure exhibits a three-dimensional heterometallic polymeric network. O-H⋯O hydrogen bonding between the uncoordinated water mol-ecule and carboxyl-ate O atoms is observed.
标题配合物{[AgEr(C₅H₃N₂O₂)₂(C₂O₄)]·H₂O}ₙ的不对称单元包含一个Er(III)原子、一个Ag(I)原子、两个吡嗪-2-羧酸酯（pyc）配体、两个半草酸酯配体（每个位于一个对称中心上）和一个未配位的水分子。Er(III)原子由来自两个pyc配体的两个O原子和两个N原子、来自第三个pyc配体的一个O原子以及来自两个草酸酯配体的四个O原子配位，呈扭曲的单帽四方反棱柱几何构型。Ag(I)原子由来自两个pyc配体的两个N原子、来自第三个pyc配体的一个O原子和来自一个草酸酯配体的一个O原子配位。晶体结构呈现出三维异金属聚合物网络。观察到未配位的水分子与羧酸酯O原子之间存在O—H⋯O氢键。
