Mössbauer and Infrared Spectra of Octahedral Complexes of Iron(II) Halides with Amides and Related Ligands

Abstract

A number of complexes of FeCl2 and FeBr2 with amides, ureas, aniline, and benzothiazole have been prepared and characterized by means of Mössbauer and i.r. spectroscopy, and magnetic measurements. The stoichiometries FeX2L, FeX2L2, FeX2L3, FeX2L4, and FeX2L6 have been found in which the iron is six coordinate. With the exception of an isobutyramide complex which is formulated as [Fe(BUA)6][FeCl4], complexes of the first three types are polymeric with bridging halogens, while FeX2L4 is monomeric and FeX2L6 is formulated as [FeL6]Cl2.