IRON(III) COMPLEXES OF VITAMIN-B-1 AND THOSE OF BROMO, IODO, PERCHLORATO, AND THIOCYANATO ANALOGS

Iron(III) complexes of vitamin B-1 and vitamin B-1 analogues have been isolated and characterized by microanalyses, magnetic susceptibility measurements, thermal gravimetric analysis, and electronic, infrared a nd Mossbauer spectroscopic measurements. The complexes appear to be ei ther 4-coordinate or 5-coordinate and are formulated as ore-bridged di mers. The room temperature magnetic moments are 4.90 - 6.06 B.M. The i somer shift of [(FeTh(OH)Cl-2)(2)O] is 0.52 mm/s, typical of high spin iron(III) compounds, but with evidence for the presence of some ferro magnetic impurity.