Hydrothermal synthesis, crystal structures, and properties of CoII and NiII supramolecular complexes with 2,4,6-trimethyl benzoate and 4,4′-bipyridyl

Two new supramolecular complexes [Co(tmb)2(4,4′-bpy)2(H2O)2](Htmb)2 (1) and {[Ni(tmb)2(μ-4,4′-bpy)2(H2O)2](4,4′-bpy)}n (2), have been prepared hydrothermally and characterized by single crystal X-ray diffraction, elemental analysis, IR, UV/Vis spectra, thermogravimetric analysis and magnetic susceptibility. With the aid of hydrogen bonds, 1 exhibits a square grid network structure and 2 shows the 2-fold interpenetrating framework with CdSO4 topology. Both complexes exhibit antimicrobial activity.