One-dimensional coordination polymers based upon bridging terephthalate ions

The reaction between transition metal halides MX2 (where M = Co(II) and Ni( II)) in an aqueous solution containing disodium terephthalate along with py ridine-based ligands gives rise to one-dimensional coordination polymers. B oth [M(terephthalate)(4-picoline)(2)(H2O)(2)]. 2(4-picoline) (1) and [M(ter ephthalate)(pyridine)(2)(H2O)2]. 2(pyridine). 2(H2O) (2) have been isolated . These frameworks exhibit hydrogen bond donors running along the backbone of each polymer, which gives rise to inclusion chemistry between the framew ork and pyridine guest molecules.