A three-dimensional coordination polymer based on the Zn-4(mu(3)-OH)(2) unit: poly[[(mu(4)-benzene-1,4-dicarboxylato)bis(mu(3)-benzene-1,4-dicarboxyla to)bis(mu(3)-hydroxido)bis(1,10-phenanthroline-5,6-dione)tetrazinc] dihydrate]

作者：Wen, Meng; Xiao, Zu-Ping; Wang, Chun-Ya; Huang, Xi-He^*

来源：Acta Crystallographica Section C-Structural Chemistry, 2015, 71(2): 136-U175.

DOI：10.1107/S2053229615000467

• three-dimensional coordination polymer
• tetranuclear zinc polymer
• crystal structure
• benzene-1,4-dicarboxylic acid
• 1,10-phenanthroline-5,6-dione
• alpha-Po topology
• polynuclear metal clusters
• pcu net

The title compound, {[Zn-4(C8H4O4)(3)(OH)(2)(C12H6N2O2)(2)]center dot-2H(2)O}(n), has been prepared hydrothermally by the reaction of Zn(NO3)(2)center dot 6H(2)O with benzene-1,4-dicarboxylic acid (H(2)bdc) and 1,10-phenanthroline-5,6-dione (pdon) in H2O. In the crystal structure, a tetranuclear Zn-4(OH)(2) fragment is located on a crystallographic inversion centre which relates two subunits, each containing a [ZnN2O4] octahedron and a [ZnO4] tetrahedron bridged by a mu(3)-OH group. The pdon ligand chelates to zinc through its two N atoms to form part of the [ZnN2O4] octahedron. The two crystallographically independent bdc(2-) ligands are fully deprotonated and adopt mu(3)-kappa O:kappa O':kappa O '' and mu(4)-kappa O:kappa O':kappa O '': kappa O ''' coordination modes, bridging three or four Zn-II cations, respectively, from two Zn-4(OH)(2) units. The Zn-4(OH)(2) fragment connects six neighbouring tetranuclear units through four mu(3)-bdc(2-) and two mu(4)-bdc(2-) ligands, forming a three-dimensional framework with uninodal 6-connected alpha-Po topology, in which the tetranuclear Zn-4(OH)(2) units are considered as 6-connected nodes and the bdc(2-) ligands act as linkers. The uncoordinated water molecules are located on opposite sides of the Zn-4(OH)(2) unit and are connected to it through hydrogen-bonding interactions involving hydroxide and carboxylate groups. The structure is further stabilized by extensive pi-pi interactions between the pdon and mu(4)-bdc(2-) ligands.

• 出版日期2015-2
• 单位福州大学