Two copper(II) coordination polymers containing atza ligand [atza = 5-aminotetrazole-1-acetato]

Two copper(II) coordination polymers [Cu(atza)2]n · 2nH2O (1) and [Cu(atza)2(4,4′-bipy)0.5 · H2O]n (2) [atza = 5-aminotetrazole-1-acetato] have been synthesized. Compound 2 is a offspring from reaction of a preformed compound 1 with 4,4′-bipyridyl. The dehydration and rehydration processes of compound 1 were investigated.