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-tetrahydropyridin-3-olate (L) anions, three O atoms of two oxalate anions and three water molecules. 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 molecules, the complex monomers are connected into polymeric two-dimensional layers parallel to the bc plane. Intermolecular O—H...O hydrogen bonds link these layers into a three-dimensional supramolecular framework.
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Document Type: Research Article
Al Muthanna University, Samawah, Al Mutanna, Iraq
Peoples' Friendship University of Russia, 6 Miklukho-Mallaya, 117198 Moscow, Russian Federation
Kurnakov Institute of General and Inorganic Chemistry RAS, 31 Leninskiy Avenue, 119991 Moscow, Russian Federation
January 1, 2015