2,5-Diphenyloxazole, 3,5-diphenylisoxazole and 3-amino, 5-methylisoxazole complexes with iron(III) salts

Abstract A number of iron(III) complexes with 2,5-diphenyloxazole (PPO), 3,5-diphenylisoxazole (3,5-diPhisox) and 3-amino, 5-methylisoxazole (3-AMI) have been isolated. The compounds are of the type Fe(L) n X 3 · m H 2 O where L = PPO, n 1, 2, 3, 6, X = Cl, Br, ClO 4 , m = 0,6; L = 3,5-diPhisox and 3-AMI, n = 3, 4, 6, X = Cl, Br, ClO 4 , m = 0–6. The complexes have been studied by chemical analysis, magnetic moments, infrared, electronic, Mossbauer spectra and molar conductivity values. The ligands act a monodentate N ring bonded and the compounds are hexacoordinate in the solid state with the exception of the tetrahedral Fe(PPO)Br 3 and the five coordinate Fe(PPO) 2 Cl 3 . The magnetic moments, are generally in agreement with those expected for high spin FE(III) complexes. Only the perchlorate derivatives according also to the Mossbauer spectra present magnetic moments values, due to a low spin Fe(III) states