MOSSBAUER SPECTRA OF SOME FERRIC HYDROXAMATES

A variety of tris(hydroxamato)iron(III) complexes were prepared and their Mossbauer spectra were obtained. In many cases relaxation effects precluded a straightforward interpretation ofpeak positions even at room temperature. Otherwise most isomer shifts and quadrupole splittings were confined to a range of values typical of high-spin iron(III) with little covalent bonding. The trisodium salt of tris (benzohydroxamato)iron(III) was preparedpure in two hydrated forms, the higher hydrate apparently displaying a large relaxation effect. Unusually largesplittings occurred in tris(salicylhydroxamato) iron(III) and tris(nicotinylhydroxamato)iron(III). © 1969, American Chemical Society. All rights reserved.