Synthesis and Structural Characterization of Iron(III) Complexes with 2-Hydroxyphenones

Four iron(III) complexes [Fe(2-OH-phenone)(3)] (1-4), in which 2-OH-phenone is the anion of the ligands 2-OH-aceto-phenone(Hapo) (1'), 2-OH-propiophenone(Hppo) (2'), 2-OH-benzophenone(Hbpo) (3') and 2-OH, 4-OCH3-benzophenone-(Hopo) (4'), were synthesized and characterized by physicochemical and spectral (IR, UV/Vis, Mossbauer) data. The X-ray diffraction study of compound 2, tris(2-hydroxypropiophenone)iron(III) [Fe(ppo)(3)] revealed a facial octahedral arrangement of the ligands around the iron(III) atom. The thermal decomposition for the compounds 2 and 4 was studied in nitrogen atmosphere, from ambient temperature to 1000 degrees C, by using the TG/DTG-DTA technique. The compounds are very stable at ambient temperature but unstable upon heating giving as residue carbonaceous iron oxide.