One-dimensional coordination polymers [Co(acac)_2pz]_n and [Co(acac)_2(4,4'-bipy)]_n (acac = acetylacetone, pz = pyrazine, bipy = 4,4'-bipyridine): synthesis, structures and magnetic properties

摘要

Two one-dimensional coordination polymers [Co(acac)_2pz]_n (1) and [Co(acac)_2(4,4'-bipy)]_n (2) have been synthesized by reaction of Co(acac)_2(H_2O)_2 with pyrazine and 4,4'-bipyridine, respectively. They have a similar structural motif, consisting of one-dimensional linear chain structure linked via bridging pyrazine or 4,4'-bipyridine, and the acac chelated to the Co(II) ion. A compared magnetic investigation shows very similar magnetic behavior for the two compounds, demonstrating the similarity of pyrazine and 4,4'-bipyridine in mediating the magnetic coupling interactions.