Two new coordination polymers based on a flexible bib ligand: Structures and magnetic properties

Two new coordination polymers, {[Co(bib)(0.5)(bdc-Br-2)] center dot CH3OH}(n), (1) and {[Co(bib)(1,4-ndc) center dot 0.5H(2)O}n (2) have been synthesized. The results of X-ray crystallographic analysis show that compound 1 exhibits a 6-connected three-dimensional (3D) 2-fold interpenetrated architectures with the point symbol of 4(12).6(3), 2 displays a 4-connected 3D 4-fold [2 + 2] interpenetrated structures with the point symbol of 6(6). The formulas of 1 and 2 were determined by X-ray crystallography, elemental analysis, and thermogravimetric analysis (TGA). In addition, the compounds 1 and 2 reveal antiferromagnetic interactions. (C) 2017 Elsevier B.V. All rights reserved.