Structure and magnetism of carboxylate/EO-azido-mixed-ligands bridged CuII systems

Using two structurally related benzoates bearing different H-bond acceptors as co-ligands, three new azido-Cu II compounds, [Cu(L 1 )(N 3 )(H 2 O)] n (1), [Cu(L 1 )(N 3 )(MeOH)] n (2), and [CuL 2 HL 2 (N 3 ) 3 (H 2 O)] n (3) (HL 1 = 4-nitrobenzoic acid; HL 2 = 2-phenyl-4-quinolinecarboxylic acid), have been synthesized and structurally characterized. 1 is a carboxylate/EO-azido bridged copper chain, forming 3D structure by H-bonds, and 2 has a similar chain structure as 1 but forming a 2D structure by H-bonds, while 3 is a 3D supramolecular network with ternary center H-bonds. Magnetic study indicates that domain ferromagnetic coupling interactions were found to exist in complexes 1 and 3.