Synthesis and Characterization of Monomeric (Aryloxo)iron Complexes: [FeIIL(OAr)] and [FeIIIL(OAr)2] {L = BH(3,5-Pri2pz)3−}

Abstract

Abstract A series of (aryloxo)iron(II) complexes [Fe{BH(3,5-Pri2pz3}(OAr)] (Ar = C6H5 (4); C6H4-p-Cl (5); C6H4-p-F (6); C6H4-p-Me (7); C6H3-2,6-Cl2 (8); C6F5 (9)) were synthesized by the anion ligand replacement of [Fe(Cl){BH(3,5-Pri2pz)3}] (1) with NaOAr. Crystallography was performed for 1 and 9. All these tetrahedral (aryloxo)iron(II) complexes react with dioxygen readily, to afford the bis(aryloxo)iron(III) complexes [Fe{BH(3,5-Pri2pz)3}(OAr)2] (Ar = C6H5 (10); C6H4-p-Cl (11); C6H4-p-F (12); C6H4-p-Me (13); C6H3-2,6-Cl2 (14); C6F5 (16)) as sole isolable products (the maximum yield based on the iron(II) complex was ca. 50%). The MeCN adduct of 13 was structurally characterized by X-ray crystallography.