Ring–ring or nitro-ring π,π-interactions in N-(p-nitrobenzyl)iminodiacetic acid (H2NBIDA) and mixed-ligand copper(II) complexes of NBIDA and imidazole (Him), 2,2′-bipyridine (bipy) or 1,10-phenanthroline (phen). Crystal structures of H2NBIDA, [Cu(NBIDA)(Him)(H2O)], [Cu(NBIDA)(bipy)]·3H2O and [Cu(NBIDA)(phen)]·2H2O | Publicación