-Poly[barium(II)-μ-(dimethyl sulfoxide)-κ :-bis-(μ-2,4,6-tri-nitro-phenolato-κ , : , )].

The asymmetric unit of the title barium coordination polymer, [Ba(CHNO)(CHOS)] , consists of a barium cation (site symmetry ) and a dimethyl sulfoxide (DMSO) ligand (point group symmetry ) and a 2,4,6-tri-nitro-phenolate anion located in general positions. The S atom and the methyl group of DMSO are disordered over two sets of sites. The DMSO ligand bridges a pair of Ba atoms resulting in a chain extending parallel to the axis. The unique 2,4,6-tri-nitro-phenolate anion also bridges a pair of Ba ions the phenolic oxygen atom, with each Ba being additionally bonded to an oxygen atom of an adjacent nitro group. The -monoatomic bridging binding mode of both types of ligands results in the formation of an infinite chain of face-sharing {BaO} polyhedra flanked by the remaining parts of the 2,4,6-tri-nitro-phenolato and DMSO ligands. In the one-dimensional coordination polymer, parallel chains are inter-linked with the aid of C-H⋯O hydrogen bonds.