title: Spin-spin interactions in iron(III) porphyrin radical cations with ruffled and saddled structure.
abstract: Oxidation of essentially pure intermediate-spin iron(III) porphyrinates such as ruffled Fe(T(i)PrP)ClO(4) and saddled Fe(OETPP)ClO(4) produces the corresponding six-coordinate iron(III) porphyrin(por) radical cations [Fe(Por·)(ClO(4))(2)], where T(i)PrP and OETPP are dianions of 5,10,15,20-tetraisopropylporphyrin and 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin, respectively. Spin-spin interactions in these complexes are very much different; while ruffled [Fe(T(i)PrP·)(ClO(4))(2)] exhibits no antiferromagnetic coupling, saddled [Fe(OETPP·)(ClO(4))(2)] does exhibit it. The difference in magnetic behaviors has been explained in terms of the deformation mode and electron configuration of these complexes.
authors: Division of Chemistry, Graduate School of Science, Toho University, Funabashi, Japan.
authors: Souhei
authors: S
authors: Kouno
authors: Akira
authors: A
authors: Ikezaki
authors: Takahisa
authors: T
authors: Ikeue
authors: Mikio
authors: M
authors: Nakamura
mesh_terms: D002412:Cations / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy; D005290:Ferric Compounds / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008665:Metalloporphyrins / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D002412:Cations; D005290:Ferric Compounds; D008665:Metalloporphyrins; D007501:Iron