catena-Poly[hexaaquamagnesium(II) [bis(mu(3)-5-nitro-2-oxidoisophthalato)dicopper(II)] dihydrate]

作者：Li Shi Jie; Song Wen Dong^*; Miao Dong Liang; Ma De Yun

来源：ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 2011, 67.

DOI：10.1107/S0108270111008869

In the centrosymmetric dinuclear anions of the title bimetallic complex, {[Mg(H2O)(6)][Cu-2(C8H2NO7)(2)]center dot 2H(2)O} (n) , each CuII ion is strongly coordinated by four O atoms in a distorted square-planar geometry. Two of these O atoms belong to phenolate groups and the other two to carboxylate groups from 5-nitro-2-oxidoisophthalate (L1) trianions, derived from 5-nitrobenzene-1,2,3-tricarboxylic acid (O2N-H-3 L). The phenolate O atoms bridge the two CuII ions in the anion. In addition, each CuII cation interacts weakly with a symmetry-related carboxylate O atom of an adjacent L1 ligand, giving a square-pyramidal coordination geometry. The copper residue forms a ladder-like linear coordination polymer via L1 ligands. The [Mg(H2O)(6)]2+ cations sit on centres of inversion. The polymeric anions, cations and free water molecules are self-assembled into a three-dimensional supramolecular network via O-H...O hydrogen bonds.

• 单位
  华南理工大学; 广东海洋大学