Two unusual copper complexes with nitrilotriacetate and 4,5-diazafluoren-9-one or trans-1,2-bis(4-pyridyl)ethylene mixed-ligands

Two unusual copper complexes [Cu(Hnta)(afo)] (1) and [Cu3(nta)2(bpe)2(H2O)4] · bpe·10H2O (2) were synthesized and characterized. 1 displays a novel zigzag chain structure via tetradentate Hnta ligands and 2 forms two-dimensional network via hydrogen bonds interactions between the coordination water molecules and nta or free bpe ligands.