Synthesis and Crystal Structure of a New One-dimensional Double Helical-chain Polymer, {Zn(O2CC12H8CO2)(H2O)}n

摘要

A new zinc polymer, {Zn(O2CC12H8CO2)(H2O)}n or {Zn(DPHA)(H2O)}n (O2CC12-H8CO2, DPHA = 1,1 ′-biphenyl-2,2′-dicarboxylate dianion) has been synthesized under hydrothermal conditions. The crystal is of monoclinic, space group P21/c with a = 12.8418(5), b = 5.9505(2),c = 17.2989(5) (A), β = 104.020(2)°, V= 1282.52(8)(A)3, C14H10O5Zn, Mr= 323.61, Z = 4, Dc = 1.676g/cm3,μ = 1.930 mm- 1, F(000) = 656, R = 0.0766 and wR = 0.1871 for 1775 observed reflections (I ＞ 2σ(I)). It consists of Zn2(DPHA)2(H2O)2 units, which are further extended into a one-dimensional double helical-chain polymer via Zn-O bonding. The hydrogen bonding interactions extend the helical chains into a two-dimensional layer structure.