Synthesis, crystal structure, and thermal properties of poly[aqua­(μ(5)-2,5-di­carb­oxy­benzene-1,4-di­carboxyl­ato)strontium]

A coordination polymer formulated as [Sr(H(2)BTEC)(H(2)O)](n) (H(4)BTEC = benzene-1,2,4,5-tetra­carb­oxy­lic acid, C(10)H(6)O(8)), was synthesized hydro­thermally and characterized by single-crystal and powder X-ray diffraction, scanning electron microscopy and thermal analysis. Its crystal structure is made up of a zigzag inorganic chain formed by edge-sharing of [SrO(8)] polyhedra running along [001]. Adjacent chains are connected to each other via the carboxyl­ate groups of the ligand, resulting in a double-layered network extending parallel to (100). O—H⋯O hydrogen bonds of medium-to-weak strength between the layers consolidate the three-dimensional structure. One of the carb­oxy­lic OH functions was found to be disordered over two sets of sites with half-occupancy.