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RESEARCH PRODUCT
Exploring the exchange interaction in a mixed valence {CoII4CoIII2} hexanuclear cluster with novel topology
Pablo AlborésLuca M. CarrellaIrene C. LazzariniEva Rentschlersubject
chemistry.chemical_classificationValence (chemistry)ChemistryExchange interactionCrystal structureMagnetic susceptibilityDivalentInorganic ChemistryMagnetizationCrystallographyFerromagnetismIntramolecular forceMaterials ChemistryPhysical and Theoretical Chemistrydescription
Abstract Reaction between [Co2(μ-OH2)(μ-Piv)2(Piv)2(HPiv)4] and a (salicylidene)ethanolamine ligand under ambient reaction conditions, affords hexanuclear complexes [CoIII2CoII4(Piv)8(HPiv)2(L)2(OH)2] (1–2). Both products have been characterized crystallographically and found to be mixed-valent, containing divalent and trivalent Co centers. Down to 30 K, the variable-temperature magnetic susceptibility data are dominated by the single-ion properties of high spin Co(II) centers with distorted-octahedral coordination geometries. Below this temperature, the effect of intramolecular ferromagnetic exchange interactions becomes apparent. Magnetic data has been analyzed in terms of ground isolated effective S ˜ = 1 / 2 Kramers doublets where low temperature magnetization data suggests an anisotropic behavior. We have also employed DFT-broken symmetry calculations to evaluate in an isotropic approach the exchange interaction pathways.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 | Polyhedron |