Zhan Ge, Li Xin Hua
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, People's Republic of China.
Acta Crystallogr C. 2010 Feb;66(Pt 2):m29-31. doi: 10.1107/S0108270109044205. Epub 2010 Jan 8.
In the title compound, {[Co(2)(C(14)H(8)O(4))(2)(C(10)H(8)N(2))(2)(H(2)O)(2)].2C(14)H(10)O(4)}(n), each Co(II) ion is six-coordinate in a slightly distorted octahedral geometry. Both Co(II) ions are located on twofold axes. One is surrounded by two O atoms from two biphenyl-2,2'-dicarboxylate (dpa) dianions, two N atoms from two 4,4'-bipyridine (bpy) ligands and two water molecules, while the second is surrounded by four O atoms from two dpa dianions and two N atoms from two bpy ligands. The coordinated dpa dianion functions as a kappa(3)-bridge between the two Co(II) ions. One carboxylate group of a dpa dianion bridges two adjacent Co(II) ions, and one O atom of the other carboxylate group also chelates to a Co(II) ion. The Co(II) ions are bridged by dpa dianions and bpy ligands to form a chiral sheet. There are several strong intermolecular hydrogen bonds between the H(2)dpa solvent molecule and the chiral sheet, which result in a sandwich structure.
在标题化合物{[Co₂(C₁₄H₈O₄)₂(C₁₀H₈N₂)₂(H₂O)₂]·2C₁₄H₁₀O₄}ₙ中，每个Co(II)离子以略微扭曲的八面体几何构型进行六配位。两个Co(II)离子均位于二重轴上。一个被来自两个联苯 - 2,2'-二羧酸根（dpa）二价阴离子的两个O原子、来自两个4,4'-联吡啶（bpy）配体的两个N原子以及两个水分子所包围，而另一个被来自两个dpa二价阴离子的四个O原子和来自两个bpy配体的两个N原子所包围。配位的dpa二价阴离子作为两个Co(II)离子之间的κ³ - 桥。一个dpa二价阴离子的一个羧酸根基团桥连两个相邻的Co(II)离子，另一个羧酸根基团的一个O原子也螯合到一个Co(II)离子上。Co(II)离子通过dpa二价阴离子和bpy配体桥连形成一个手性层。H₂dpa溶剂分子与手性层之间存在若干强分子间氢键，从而形成一种夹心结构。
