Zhou Dong, Shao Min, He Xiang, Zhao Yongmei, Zhu Shourong
Acta Crystallogr Sect E Struct Rep Online. 2009 Apr 25;65(Pt 5):m562-3. doi: 10.1107/S1600536809014639.
The asymmetric unit of the title complex, [Ni(2)(C(16)H(6)O(8))(C(10)H(8)N(2))(2)(H(2)O)(6)]·6H(2)O, contains one Ni(II) atom, one 2,2'-bipyridine ligand, three coordinated water mol-ecules, one-half of a fully deprotonated biphenyl-3,3',4,4'-tetra-carboxyl-ate anion and three lattice water mol-ecules. The Ni(II) atom displays a distorted NiN(2)O(4) octa-hedral coordination formed by one carboxyl-ate O atom, three water O atoms and two N atoms of the chelating ligand. The complete biphenyl-3,3',4,4'-tetra-carboxyl-ate ligand displays inversion symmetry and links two symmetry-related Ni(II) atoms into a binuclear complex. Neighbouring complex mol-ecules are linked through O-H⋯O hydrogen bonds into a three-dimensional structure. Additional O-H⋯O hydrogen bonds between the lattice water mol-ecules help to consolidate the crystal packing.
标题配合物[Ni₂(C₁₆H₆O₈)(C₁₀H₈N₂)₂(H₂O)₆]·6H₂O的不对称单元包含一个Ni(II)原子、一个2,2'-联吡啶配体、三个配位水分子、一个完全去质子化的联苯-3,3',4,4'-四羧酸根阴离子的一半以及三个晶格水分子。Ni(II)原子呈现出由一个羧酸根O原子、三个水O原子和螯合配体的两个N原子形成的扭曲的NiN₂O₄八面体配位。完整的联苯-3,3',4,4'-四羧酸根配体具有反演对称性，并将两个对称相关的Ni(II)原子连接成一个双核配合物。相邻的配合物分子通过O-H⋯O氢键连接成三维结构。晶格水分子之间额外的O-H⋯O氢键有助于巩固晶体堆积。
