A novel (4,6)‐connected double‐layered BaII coordination polymer based on the flexible tricarboxylate ligand 2,2′,2′′‐[1,3,5‐triazine‐2,4,6‐triyltris(sulfanediyl)]triacetic acid

In the title compound, polytriaqua{μ₄‐2‐4,6‐bis(carboxymethylsulfanyl)‐1,3,5‐triazin‐2‐ylsulfanyl]acetato}{μ₂‐2‐4,6‐bis(carboxymethylsulfanyl)‐1,3,5‐triazin‐2‐ylsulfanyl]acetato}barium(II)] monohydrate], {Ba(C₉H₈N₃O₆S₃)₂(H₂O)₃]·H₂O}_n, each Ba^II atom is nine‐coordinated by six O atoms from carboxylate groups of four different 2‐4,6‐bis(carboxymethylsulfanyl)‐1,3,5‐triazin‐2‐ylsulfanyl]acetate ligands and three O atoms from water molecules. The triazine ligand is partially deprotonated, as verified by intermolecular hydrogen‐bonding parameters, and adopts μ₂‐η¹:η¹ and μ₄‐η¹:η¹:η² coordination modes to connect the Ba^II centres, forming a novel double‐layered structure. Topological analysis indicates that the whole structure is a novel (4,6)‐connected net, considering the ligands and Ba^II centres as four‐ and six‐connected nodes, respectively.