A novel coordination polymer, [Cd2Cl4（bpme）]n·n（H2O） （1, bpme=2,5-bis（be-nzoimidazol-2-yl）pyrazine）, has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction. The crystal of the complex belongs to the triclinic system, space group P , with a=7.0737（9）, b=8.7886（11）, c=9.4561（12） , α=105.3580（10）, β=94.981（2）, γ=96.879（2）°, V=558.46（12） 3, Mr=714.97, Z=1, F（000）=346, Dc=2.126 g/cm3, μ=2.412 mm-1, T=296（2） K, S=1.057, R=0.0533 and wR=0.1480. According to the structural analysis, the Cd（Ⅱ） ion adopts a slightly distorted six-coordinated octahedral geometry. The Cd（Ⅱ） atoms are bridged by four Cl atoms along the a direction, forming infinite straight chains which are further constructed to generate 2D network layer structures through the μ4-N bpme ligand in the b direction, and such 2D network layer structures finally form a novel three-dimensional infinite supramolecular framework through weak π-π stacking between two network layers and hydrogen bonds.
