metal-organic compounds
Open access
In the title compound, [Eu2(C6H5NO3)2(C2O4)3(H2O)4]n, the EuIII atom is bonded to one O atom from a monodentate 5-hydroxypyridin-1-ium-3-carboxylate ligand, six O atoms from three oxalate ligands and two water molecules, exhibiting a highly distorted tricapped trigonal geometry. Three independent oxalate ligands, each lying on an inversion center, bridge the EuIII atoms, forming a brickwall-like layer parallel to (001), which is stabilized by intralayer O—HO hydrogen bonds. The layers are further linked through interlayer O—HO and N—HO hydrogen bonds and π–π interactions between the pyridine rings [centroid–centroid distance = 3.5741 (14) Å] into a three-dimensional supramolecular network.