Zhou Ying-Hua, Chen Jian, Cheng Yong, Zhang Nian-Rong
College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2010 Dec 4;67(Pt 1):m15-6. doi: 10.1107/S1600536810049275.
The asymmetric unit of the title coordination polymer, Pb(2)(C(8)H(2)NO(6))(OH), contains two crystallographically independent Pb(II) ions, one pyridine-2,4,6-tricarboxyl-ate (ptc) trianion and one hydroxide anion. One of the Pb(II) atoms is coordinated by one pyridine N and four carboxyl-ate O atoms from the ptc trianion and a hydroxide O atom in a distorted octa-hedral geometry. The other Pb(II) atom is five-coordinated by three carboxyl-ate O atoms and two hydroxide O atoms in a distorted tetra-gonal-pyramidal geometry. Four neighbouring Pb(II) atoms are bridged through two μ(3)-hydroxide ligands, forming the centrosymmetric Pb(4)(OH)(2) core. The three-dimensional structure is further achieved through bridging carboxyl-ate groups. There are also O-H⋯O hydrogen bonds between the hydroxide ligand and the carboxyl-ate group.
标题配位聚合物[Pb₂(C₈H₂NO₆)(OH)]ₙ的不对称单元包含两个晶体学独立的Pb(II)离子、一个吡啶-2,4,6-三羧酸根（ptc）三阴离子和一个氢氧根阴离子。其中一个Pb(II)原子由来自ptc三阴离子的一个吡啶N原子、四个羧酸根O原子和一个氢氧根O原子以扭曲的八面体几何构型配位。另一个Pb(II)原子由三个羧酸根O原子和两个氢氧根O原子以扭曲的四方锥几何构型五配位。四个相邻的Pb(II)原子通过两个μ₃-氢氧根配体桥连，形成中心对称的Pb₄(OH)₂核。三维结构通过桥连羧酸根基团进一步形成。氢氧根配体和羧酸根基团之间也存在O-H⋯O氢键。
