biostudies-literatureUnknown71(Pt 5)Alabada RIn the title coordination polymer, [Ba(C5HN2O6)(C2O4)0.5(H2O)2] n , the tenfold coordination of the Ba centre consists of four O atoms from the two 4-nitro-2,5,6-trioxo-1,2,5,6-tetra-hydro-pyridin-3-olate (L) anions, three O atoms of two oxalate anions and three water mol-ecules. The Ba-O bond lengths fall in the range 2.698 (3)-2.978 (3) Å. The L ligand chelates two Ba atoms related by a screw axis, leading to formation of fused five- and six-membered chelate rings. Due to the bridging function of the ligands and water mol-ecules, the complex monomers are connected into polymeric two-dimensional layers parallel to the bc plane. Inter-molecular O-H⋯O hydrogen bonds link these layers into a three-dimensional supra-molecular framework.Acta crystallographica. Section E, Crystallographic communications459-62https://www.ebi.ac.uk/biostudies/studies/S-EPMC4420117biostudies-literatureCrystal structure of poly[μ2-aqua-aqua-(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetra-hydro-pyridin-3-olato)hemi-μ4-oxalato-barium(II)].PMC4420117Kovalchukova OStrashnova SAlabada RPolyakova ISergienko VfalseCrystal structure of poly[μ2-aqua-aqua-(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetra-hydro-pyridin-3-olato)hemi-μ4-oxalato-barium(II)].In the title coordination polymer, [Ba(C5HN2O6)(C2O4)0.5(H2O)2] n , the tenfold coordination of the Ba centre consists of four O atoms from the two 4-nitro-2,5,6-trioxo-1,2,5,6-tetra-hydro-pyridin-3-olate (L) anions, three O atoms of two oxalate anions and three water mol-ecules. The Ba-O bond lengths fall in the range 2.698 (3)-2.978 (3) Å. The L ligand chelates two Ba atoms related by a screw axis, leading to formation of fused five- and six-membered chelate rings. Due to the bridging function of the ligands and water mol-ecules, the complex monomers are connected into polymeric two-dimensional layers parallel to the bc plane. Inter-molecular O-H⋯O hydrogen bonds link these layers into a three-dimensional supra-molecular framework.2015-01-01T00:00:00Z2015 May2025-04-27T00:55:20.391Z2019-03-27T01:51:01ZS-EPMC44201172599585510.1107/S2056989015006520