Anisotropic double exchange in valence-delocalized [Fe2.5+ Fe2.5+] cluster

Belinsky, Moisey I.

doi:10.1016/j.jmmm.2006.10.454

Cited by 1 publication

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References 18 publications

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“…Multimetallic complexes of osmium, 62 ruthenium 63 and iron 64,65 in mixed-valent oxidation states typically exhibit broad absorption bands in near infrared which were ascribed to so-called intervalence charge transfer (IVCT) or metal-tometal charge transfer (MMCT). [65][66][67][68][69][70] These transitions are established for mixed valent compounds as a good measure of the electron delocalisation.…”

Section: Negative Esi Msmentioning

confidence: 99%

Halide coordinated homoleptic [Fe₄S₄X₄]²⁻and heteroleptic [Fe₄S₄X₂Y₂]²⁻clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

et al. 2016

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New facile methods to prepare iron sulphur halide clusters [Fe4S4X4](2-) from [Fe(CO)5] and elemental sulphur were elaborated. Reactions of ferrous precursors like tetrahalidoferrates(ii) or simple ferrous halides with [Fe(CO)5] and sulphur turned out to be efficient methods to prepare homoleptic [Fe4S4X4](2-) (X = Cl, Br) and heteroleptic clusters [Fe4S4X4-nYn](2-) (X = Cl, Br; Y = Br, I). Solid materials were obtained as salts of BTMA(+) (= benzyltrimethylammonium); the new compounds containing [Fe4S4Br4](2-) and [Fe4S4X2Y2](2-) (X, Y = Cl, Br, I) were all isostructural to (BTMA)2[Fe4S4I4] (monoclinic, Cc) as inferred from synchrotron X-ray powder diffraction. While the solid materials contain defined heteroleptic clusters with a halide X : Y ratio of 2 : 2, dissolving these compounds leads to rapid scrambling of the halide ligands forming mixtures of all five possible [Fe4S4X4-nYn](2-) clusters as could be shown by UHR-ESI MS. The variation of X and Y allowed assignment of the absorption bands in the visible and NIR; the long-wavelength bands around 1100 nm were tentatively assigned to intervalence charge transfer (IVCT) transitions.

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Section: Negative Esi Msmentioning

confidence: 99%

Halide coordinated homoleptic [Fe₄S₄X₄]²⁻and heteroleptic [Fe₄S₄X₂Y₂]²⁻clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

et al. 2016

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Anisotropic double exchange in valence-delocalized [Fe2.5+ Fe2.5+] cluster

Cited by 1 publication

References 18 publications

Halide coordinated homoleptic [Fe₄S₄X₄]²⁻and heteroleptic [Fe₄S₄X₂Y₂]²⁻clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

Halide coordinated homoleptic [Fe₄S₄X₄]²⁻and heteroleptic [Fe₄S₄X₂Y₂]²⁻clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

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Anisotropic double exchange in valence-delocalized [Fe2.5+ Fe2.5+] cluster

Cited by 1 publication

References 18 publications

Halide coordinated homoleptic [Fe4S4X4]2−and heteroleptic [Fe4S4X2Y2]2−clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

Halide coordinated homoleptic [Fe4S4X4]2−and heteroleptic [Fe4S4X2Y2]2−clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

Contact Info

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Halide coordinated homoleptic [Fe₄S₄X₄]²⁻and heteroleptic [Fe₄S₄X₂Y₂]²⁻clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state

Halide coordinated homoleptic [Fe₄S₄X₄]²⁻and heteroleptic [Fe₄S₄X₂Y₂]²⁻clusters (X, Y = Cl, Br, I)—alternative preparations, structural analogies and spectroscopic properties in solution and solid state