Molecular structures of five-coordinated halide ligated iron(III) porphyrin, porphycene, and corrphycene complexes

Yoshiki Ohgo, Saburo Neya, Takahisa Ikeue, Masashi Takahashi, Masuo Takeda, Noriaki Funasaki, Mikio Nakamura

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Abstract

Molecular structures of 12 porphyrin analogues, FeIII(EtioP)X(1a-1d), FeIII(EtioCn)X(2a-2d), and FeIII(Etio-Pc)X(3a-3d), where X = F (a), Cl (b), Br (c), and I (d), are determined on the basis of X-ray crystallography. Combined analyses using Mössbauer, 1H NMR, and EPR spectroscopy as well as SQUID magnetometry have revealed that 3d exhibits a quite pure S = 3/2 spin state with a small amount of an S = 5/2 spin admixture. In contrast, all the other complexes show the S = 5/2 spin state with a small amount of the S = 3/2 spin admixture. The structural and spectroscopic data indicate a strong correlation between the spin states of the complexes and the core geometries such as Fe-N bond lengths, cavity areas, and ΔFe values.

Original languageEnglish
Pages (from-to)4627-4629
Number of pages3
JournalInorganic Chemistry
Volume41
Issue number18
DOIs
Publication statusPublished - 2002 Sep 9

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Ohgo, Y., Neya, S., Ikeue, T., Takahashi, M., Takeda, M., Funasaki, N., & Nakamura, M. (2002). Molecular structures of five-coordinated halide ligated iron(III) porphyrin, porphycene, and corrphycene complexes. Inorganic Chemistry, 41(18), 4627-4629. https://doi.org/10.1021/ic0256866