A novel two-dimensional (4,4) network based on dinuclear cadmium secondary building units: poly[(μ<sub>5</sub>-benzene-1,4-diacetato)[μ<sub>2</sub>-1,4-bis(1,2,4-triazol-1-yl)butane]cadmium(II)]
作者:Jun Wang、Xiao-Juan Xu、Jian-Qing Tao
DOI:10.1107/s0108270111011413
日期:2011.5.15
In the title mixed-ligand metal-organic polymeric compound, [Cd(C10H8O4)(C8H12N6)] (n) or [Cd(PBEA)(BTB)] (n) [H(2)PBEA is benzene-1,4-diacetic acid and BTB is 1,4-bis(1,2,4-triazol-1-yl)butane], the asymmetric unit contains one CdII ion, one BTB molecule and one PBEA2- anion. The CdII ion is in a slightly distorted pentagonal-bipyramidal geometry, coordinated by five carboxylate O atoms from three distinct PBEA2- anions and by two BTB N atoms. There are two coordination patterns for the carboxylate groups of the PBEA2- ligand, one being a mu(1)-eta 1:eta 1 chelating mode and the other a mu(2)-eta 2:eta 1 bridging mode, while the BTB molecule shows a trans-trans-trans conformation. The crystal structure is constructed from the secondary building unit (SBU) [Cd-2(CO2)(4)N2O2], in which the two metal centres are held together by two PBEA2- linkers. The SBU is connected by BTB and PBEA2- bridges to form a two-dimensional grid-like (4,4) layer with meshes of dimensions 14.69 x 11.28 A.