Construction of Two New Cd(II) Coordination Polymers via Isomeric Biphenyldicarboxylates and Imidazole-Containing Ligands

Two new coordination polymers, [Cd(2,2′-bpdc)(bmib)0.5 (H2O)]n (1) and [Cd2(3,4′-bpdc)2 (bmib) (H2O)]n (2), have been synthesized via hydrothermal reactions of Cd2+with the two isomeric carboxylate (2,2′-bpdc = biphenyl -2,2′-dicarboxylate and 3,4′-bpdc = biphenyl-3,4′- dicarboxylate) and one imidazole-containing (bmib = 1,4-bis (2-methyl-1H-imidazol-1-ylmethy) benzene)ligands. Two coordination polymers show different structures due to the different carboxylate ligands. Complex 1 shows a one-dimensional ladder-like structure. Complex 2 displays a three-dimensional pcu topological net.