The use of anions of 6,6′-bis(1H-tetrazol-5-yl)-2,2′-bipyridine (H2btzbp) as chelating ligands in preparing a coordination polymer is described. The synthesis, X-ray crystal structure and magnetic properties of a new Co(II) coordination polymer, [Co(btzbp)]n (1), are reported. The in situ [2 + 3] cycloaddition reaction of 6,6′-dicyano-2,2′-bipyridine with sodium azide in the presence of Co(ClO4)2 under hydrothermal conditions afforded compound 1. Structural characterization revealed that 1 features a distorted two-dimensional (2D) grid layer generated by both tetrazolate and 2,2′-bipyridyl bridges of the btzbp2− ligand. Variable temperature and field magnetic susceptibility measurements indicate that compound 1 exhibits spin canting with TN = 4.0 K and metamagnetism with Hc = 300 G.
