Yu Jian
Department of Chemistry, Lishui University, 323000 Lishui, ZheJiang, People's Republic of China .
Acta Crystallogr Sect E Struct Rep Online. 2009 Apr 18;65(Pt 5):m535-6. doi: 10.1107/S1600536809013580.
The Ni(II) ion in the one-dimensional title complex, {[Ni(2)(C(4)H(2)O(4))(OH)(2)(C(10)H(9)N(3))(2)]·2H(2)O}(n), has a distorted square-pyramidal coordination environment formed by three O atoms from two bridging hydroxide groups and one carboxyl-ate group of the fumarate ligand and two pyridine N atoms from a di-2-pyridylamine (dpa) ligand. Two hydroxide groups link adjacent metal centers, forming a centrosymmetric four-membered [Ni(2)(OH)(2)] ring. In the crystal structure, the H atoms of the bridging hydroxide groups form inter-molecular hydrogen bonds to both water mol-ecules. These are further linked to the uncoordinated O atoms of the carboxyl-ate groups and the NH group of a dpa ligand to generate a three-dimensional network from the chains of the coordination polymer.
在一维标题配合物{[Ni₂(C₄H₂O₄)(OH)₂(C₁₀H₉N₃)₂]·2H₂O}ₙ中，Ni(II)离子具有扭曲的四方锥配位环境，该环境由来自两个桥连羟基的三个O原子、富马酸酯配体的一个羧酸根基团以及来自二 - 2 - 吡啶胺（dpa）配体的两个吡啶N原子构成。两个羟基连接相邻的金属中心，形成一个中心对称的四元[Ni₂(OH)₂]环。在晶体结构中，桥连羟基的H原子与两个水分子形成分子间氢键。这些氢键进一步与羧酸根基团的未配位O原子以及dpa配体的NH基团相连，从而由配位聚合物链生成三维网络。
