Mixed-valence Dinuclear Iron Complexes with a Nonadentate Polypyridine Ligand: High-spin Iron(II)-Low-spin Iron(III)

DOI: 10.1039/DT9950003533

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 3533 - 3536 (1995)

Update date:2022-08-03

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Authors:

Maeda, Yonezo

Kawano, Kota

Oniki, Takayuki

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Article abstract of DOI:10.1039/DT9950003533

Dinuclear iron(II,III) complexes X2 with a nonadentate ligand HL, i.e. 4-methyl-2,6-bisphenol, and X = PF6(-) (1) or BPh4(-) (2) have been prepared.Their Moessbauer spectra consist of two quadrupole doublets due to high-spin iron(II) and low-spin iron(III).The magnetic susceptibilities are consistent with this.Cyclic voltammograms in dried acetonitrile showed a quasi-reversible redox couple with E₁ = -0.07 V and an irreversible redox couple with E₂ = 0.58 V vs. saturated calomel electrode for 1, corresponding to a comproportionation constant of 1.0E12.No visible or near-infrared bands due to intervalence electron transitions between iron-(II) and -(III) were observed.

Full text of DOI:10.1039/DT9950003533

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