Poly[[pentaaquabis(μ3-hydrogen squarato)barium] monohydrate]

Abstract

The crystal structure of the title compound, {[Ba(C4HO4)2(H2O)5]·H2O}n, consists of discrete double chains propagating along [010]. The chains are formed by BaII ions linked by bridging hydrogen squarate ligands in a trans-bis-monodentate mode. In addition, the bridging hydrogen squarate ligands connect the chains into a ladder structure via a third coordinating O atom. The remaining coordination sites are occupied by five aqua ligands and a second mondendate hydrogen squarate ligand, forming a slightly distorted tricapped trigonal–prismatic geometry. O—H...O hydrogen bonds link the chains and solvent water molecules into a three-dimensional network.