| Abstract: | The title compound, poly[[diaqua‐1κ2O‐tetrakis(μ3‐pyridine‐2,3‐dicarboxylato)‐2:1:2′κ10N,O2:O2′,O3:O3′;2:1:2′κ8O3:O3′:N,O2‐diiron(III)strontium(II)] dihydrate], {[Fe2Sr(C7H3O4)4(H2O)2]·2H2O}n, which has triclinic (P) symmetry, was prepared by the reaction of pyridine‐2,3‐dicarboxylic acid, SrCl2·6H2O and Fe(OAc)2(OH) (OAc is acetate) in the presence of imidazole in water at 363 K. In the crystal structure, the pyridine‐2,3‐dicarboxylate (pydc2−) ligand exhibits μ3‐η1,η1:η1:η1 and μ3‐η1,η1:η1,η1:η1 coordination modes, bridging two FeIII cations and one SrII cation. The SrII cation, which is located on an inversion centre, is eight‐coordinated by six O atoms of four pydc2− ligands and two water molecules. The coordination geometry of the SrII cation can be best described as distorted dodecahedral. The FeIII cation is six‐coordinated by O and N atoms of four pydc2− ligands in a slightly distorted octahedral geometry. Each FeIII cation bridges two neighbouring FeIII cations to form a one‐dimensional [Fe2(pydc)4]n chain. The chains are connected by SrII cations to form a three‐dimensional framework. The topology type of this framework is tfj . The structure displays O—H...O and C—H...O hydrogen bonding. |
