| Abstract: | In the title compound, Ba{HOOC(C6H4)2CO2}2(H2O)2] or Ba(C14H9O4)2(H2O)2], the Ba atoms are coordinated by nine O atoms, six from two 2′‐carboxybiphenyl‐2‐carboxylate (Hbpdc?) ligands and three from three coordinated water molecules, resulting in the formation of face‐sharing distorted monocapped square antiprisms. The Hbpdc? ligands bridge the Ba atoms to form a one‐dimensional helical polymer, with a Ba?Ba distance across the chain of 4.1386 (17) Å. Adjacent chains are parallel to each other. The two independent ligands are tetradentate and have the same coordination mode, exhibiting μ‐oxo bridges and η8‐chelation. The crystal structure is further stabilized by hydrogen bonds within each chain. |
