Two Isomorphic Coordination Polymers Based on Triazolyl Derivative and Dicarboxylate Ligand: Synthesis, Structures, and Properties

Two new isomorphic inorganic-organic hybrid 2D extended networks of Mn(II)/Co(II) with the general molecular formula [M(H2L)(ip)]n·4nH2O, where Mn(II) (1), Co(II) (2), H2L = 3-(1H-pyrazol-4-yl)-5-(pyridin-4-yl)-1,2,4-triazole, H2ip = 1,3-benzenedicarboxylic acid, have been synthesized and characterized by single-crystal X-ray diffraction and magnetic measurements. They crystallize in the triclinic system, space group P-1, display the same box-like bilayer motif of (4, 4) net, and are finally extended into the three-dimensional supramolecular structure via hydrogen bonding interactions. The compound 1 is characterized by antiferromagnetic fitting data based on a dimeric Mn(II) model with negligible magnetic transmission through the carbon skeleton of ip2– and H2L pathway. Thermal analysis of compound 1 has also been studied.