1346992-46-8Relevant academic research and scientific papers
One-electron oxidized product of difluoroiron(iii) porphyrin: Is it iron(iv) porphyrin or iron(iii) porphyrin π-cation radical?
Ikezaki, Akira,Takahashi, Masashi,Nakamura, Mikio
body text, p. 9163 - 9168 (2011/10/17)
The electronic structure of [Fe(TMP)F2], which is formally a one-electron oxidation equivalent above [FeIII(TMP)F 2]-, has been examined in solution by 1H NMR, UV-Vis, and Moessbauer spectroscopy. In CD2Cl2-CD 3OD solution at 193 K, the pyrrole-H and m-H signals appeared at 128.2 and 116.7 ppm, respectively. The UV-Vis spectrum showed broad absorption bands at 560-680 nm. The Moessbauer spectrum taken in frozen toluene-methanol solution exhibited a very broad single line from which the IS and QS values were determined by computer simulation to be 0.50 and 0.14 mm s-1, respectively. On the basis of these results, it was concluded that the one-electron oxidized product of [Fe(TMP)F2]- should be formulated as the iron(iii) radical cation [FeIII(TMP) F2], not as iron(iv) porphyrin [FeIV(TMP)F2] as previously suggested.
