| Summary: | The title complex, [Fe2O(SO4)2(C12H8N2)4]·8H2O, contains two unique FeIII cations, one oxide anion, four 1,10-phenanthroline (phen) ligands, two coordinated sulfate anions and eight lattice water molecules. Each FeIII ion has an approximate octahedral geometry, coordinated by four N atoms from two phen molecules, two O atoms from oxide and sulfate anions, respectively. The parallel phen molecules form two-dimensional supermolecules through π–π stacking interactions [centroid–centroid distances = 3.684 (3), 3.711 (3), 3.790 (3), 3.847 (3), 3.746 (3), 3.732 (3) and 3.729 (3) Å]. This architecture is further stabilized by O—H...O hydrogen bonds involving the lattice water molecules and sulfate O atoms.
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