Synthesis, Crystal Structures, and Magnetic Properties of Two Manganese(II)/Cobalt(II) Coordination Polymers Constructed by Nitrogenous Carboxylic Acid

Abstract

Two new coordination polymers, {[Mn2(L)(H2O)2]·H2O}n (1) and {[Co2(L)(H2O)2]·H2O}n (2) (H4L = 2-(2,4,6-tricarboxylphenyl)-6-carbxoylbenzimi-dazole), have been synthesized under hydrothermal conditions and characterized by element analysis, powder XRD and single crystal X-ray diffraction. The results indicate complex 1 as a 2D carboxylate layer structure, which is extended by hydrogen bonds resulting in a three-dimensional supramolecular network. The structure of 2 is isomorphic to that of 1. Magnetic measurements demonstrate weak antiferromagnetic interactions between the neighbouring Mn(II) ions in 1.