Construction of two new cadmium(II) coordination polymers based on dicarboxylate and 4,4-bis(1-imidazol-yl)-2,5-dimethyl benzene ligands

Two new Cd(II) coordination polymers, namely [Cd2(ipa)2(bib)1.5]n (1; H2ipa = isophthalic acid and bib = 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene) and {[Cd2(bpdc)2(bib)2]·5H2O}n (2; H2bpdc = biphenyl-4,4′-dicarboxylate), were prepared by the assemble of Cd2 +, dicarboxylate and bib ligands. Complex 1 shows a three-dimensional (3D) framework with 7-connected topological net, which can be viewed as constructing by linking two-fold interpenetrating pcu net. Complex 2 features a 3D 2-fold pcu topological net.