A three-dimensional Cu-Na heteronuclear coordination polymer based on iminodiacetic acid

作者：Wang, Yu-Hong^*; Song, Rui-Feng; Jiang, Fan

来源：Acta Crystallographica Section C-Crystal Structure Communications, 2013, 69(9): 1026-+.

DOI：10.1107/S0108270113022075

• crystal structure
• heteronuclear coordination polymers
• copper-sodium compounds
• iminodiacetic acid
• optical diffuse reflectance analysis
• TGA-DSC curves

A novel Cu-Na heteronuclear three-dimensional coordination polymer, poly[diaquadi-mu(5)-iminodiacetato-di-mu(4)-iminodiacetato-tricopper(II)disodium(I)], [Cu3Na2(C4H5NO4)(4)(H2O)(2)](n), has been prepared by hydrothermal synthesis. The asymmetric unit contains one and a half copper(II) cations, a sodium cation, two iminodiacetate (ida) ligands and a coordinated water ligand. One of the two independent Cu-II centres is in a general position and is five-coordinated in a distorted square-pyramidal geometry. A [Cu(ida)] unit is formed via a bis-chelating ida ligand and the coordination sphere of the Cu-II atom is completed by two O atoms of two different neighbouring [Cu(ida)(2)] units. These [Cu(ida)(2)] units are associated with the second Cu-II cation, which is located on a crystallographic inversion centre and is coordinated in a distorted square-planar geometry by two chelating ida ligands. The carboxylate groups of the ida ligands act as bridges and connect the [Cu(ida)] and [Cu(ida)(2)] building blocks in a 2:1 ratio, forming two-dimensional arrays. These layers are interconnected into a three-dimensional structure by the sodium ions. Each Na-I cation is coordinated by six O atoms from five ida ligands and a water molecule. When [Cu(ida)], the Na-I cations and [Cu(ida)(2)] are viewed as 5-, 5- and 8-connected nodes, respectively, the three-dimensional network exhibits a (3(2).4(3).5(2).6(3))(2)(3(2).4(3).5(2).6(3))(2)(3(4).6(16).7(8)) topology.

• 出版日期2013-9
• 单位苏州科技大学