Spin States of Iron(III) in Highly Saddled Dodecaphenylporphyrin Complexes
Iron(III) complexes of highly saddled dodecaphenylporphyrin, Fe(DPP)X (X = Cl, Br or I) have been prepared and characterized by Mössbauer, UV-Vis and magnetic measurements. The Mössbauer spectra, recorded at temperatures from 5 to 300 K, contain two components A and B. Component A is attributed to iron(III) in a spin-admixed (S = 3/2, 5/2) state. The UV-Vis spectra of solution samples of these complexes exhibit broad and red-shifted absorption bands. The effective magnetic moments derived from the molar magnetic susceptibilities measured by modified Gouy method at 298 K for X = Cl, Br and I are 5.52, 5.10 and 4.28 μ B, respectively.
Keywordsintermediate-spin iron(III) spin admixture dodecaphenylporphyrin iron porphyrin complexes Mössbauer spectra
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