The magnetic behavior of n-alkyliron(lll) (or n-aryliron(III)) porphyrins is studied in solution and in solid state by various spectroscopic methods: *H NMR, ESR, and 57Fe Móssbauer spectroscopies. Variable-temperature magnetic susceptibility measurements were also performed on these complexes. The iron(III) atom of these compounds is present in different spin states.
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