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Synthesis, Structural, Redox and Mössbauer Characterization of Four‐Electron‐Oxidized Tetrakis(cyclohexyl)iron(II)porphodimethene with Different Axial Ligations (Eur. J. Inorg. Chem. 22/2010)
Author(s) -
Bhattacharya Dibyendu,
Sarkar Sabyasachi
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201090063
Subject(s) - chemistry , redox , ligand (biochemistry) , electron transfer , crystallography , metal , mössbauer spectroscopy , inorganic chemistry , stereochemistry , photochemistry , organic chemistry , biochemistry , receptor
The cover picture shows induced electron‐transfer reactions with I 2 or Br 2 as external oxidant, Fe III as internal oxidant, and coordinated porphyrinogen as internal reductant. As a result of this simultaneous metal‐ and ligand‐based redox reaction, the square‐planar iron(III) complex is transformed to a square‐pyramidal iron(II) complex, and the tetraanionic porphyrinogen ligand is oxidized to the neutral porphodimethene. The iron(III/II) redox potential of porphodimethene complexes are more positive than that of the heme cofactor. The large quadruple splitting with large isomeric shift indicates a high‐spin state ( S = 2) for the [L ΔΔ Fe II –I] + cation. Details are discussed in the article by S. Sarkar et al. on p. 3429 ff.