Synthesis, Characterization, and Magnetic Properties of Iron Complexes Bearing Polydentate Nitrogen Ligands

Four iron complexes IIPhN(CH2)(2)NH(SiMe3)](4)FeLE2O (1). [PhNl(CH2)(3)NSiMe3](2)EeLi(Et2O) (2), [PhN(CH2)(2)NCH(Ph)NSi-Me-3](2)EeL]LiEt2O)(2) (3), and [PhN(Cl-H-2)(3)INICH(Ph)NSiMe3](2)EeL]Et2O)(2) (4)) with polydentate nitrogen ligands were synthesized and structurally characterized by X-ray crystallography. The X-ray structures of complexes 1-4 show that they crystallize in three different systems. The magnetic properties of 1-4 were investigated. The magnetization trends of magnetic field intensity show the curves of Type-S, illustrating those complexes 1-4 are superparamagnetic.