Syntheses, structures and thermal stabilities of four complexes with 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole ligand

Reactions of 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole (3-abpt) with metal acetates gave rise to four new complexes [Cu(3-abpt)(ip)]n·2nH2O (1), [Co(3-abpt)(ip)(H2O)2]n·2nH2O (2), [Ni(3-abpt)(tp)(H2O)2]n(3) and [Cu(3-abpt)2(CH3COO)2(H2O)2] (4) (ip = isophthalate, tp = terephthalate), which were characterized by EA, IR and X-ray crystallography. Compound 1 consists of two kinds of ring-like chain which are interconnected to form an unusual two-dimensional layered motif. Compounds 2 and 3 are both 1D ring-like infinite chains. Compound 4 is a mononuclear complex. The thermal stabilities of coordination polymers 1–3 have been investigated.