Acta Cryst. (2013). E69, m294-m295 [ doi:10.1107/S1600536813011057 ]
Abstract: 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 - interactions between the pyridine rings [centroid-centroid distance = 3.5741 (14) Å] into a three-dimensional supramolecular network.
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