Synthesis and Crystal Structure of a New Dinuclear Iron(III) Complex: [Fe₂O(PhCO₂)₂(2,2′‐bpy)₂(N₃)₂]·H₂O

Abstract

By using a precursor complex [Fe3O(PhCO2)6(H2O)3]NO3 as starting material and 2,2′‐bpy (= 2,2′‐bipyridine) as rigid chelating ligand, the new dinuclear iron‐oxido complex [Fe2O(PhCO2)2(2,2′‐bpy)2(N3)2]·H2O (1) was synthesized and structurally characterized. The reaction of [Fe3O(PhCO2)6(H2O)3]NO3 with 2,2′‐bpy and sodium azide in 1:3:3 ratio gave the dinuclear complex 1, whereas a 1:6:3 ratio reaction system only gave the complex [Fe(2,2′‐bpy)3]3+, which indicated that 2,2′‐bipyridine plays a crucial function in the nuclear forming procedure. Meanwhile, the N3– ligands take up the chelating domain of oxygen and reduce the nucleation. Different π–π interactions exist in 1, which extend its structure to a three dimensional supramolecular framework.