MAGNETIC HYPERFINE MOSSBAUER-SPECTRA OF FERROCENYALDIMINES-FECL3 ADDUCTS

Ferrocenylaldimines (Fc-CH=N-R) were prepared by condensation of Schif f base of formylferrocene with polyacenylamines RNH2; R = naphthyl, an thracenyl and pyrenyl groups. This step was followed by oxidation with FeCl3 to give [Fc-CH=NR]-FeCl3 adducts. The electronic state of iron in these adducts was investigated by means of Fe-57 Mossbauer spectra except for [Fc-CH=N-Pyr]-FeCl3 showed that only a doublet was observed at ambient temperature. As the temperature was decreased below 200 K, additional magnetic hyperfine splitting was observed characteristic o f ferric oxide.