0000000001310240
AUTHOR
Irene C. Lazzarini
Magnetic Study of a Pentanuclear {Co 2 III Co 3 II } Cluster with a Bent {Co II 3 } Motif
We have synthesised and structurally characterised a new pentanuclear mixed-valent cobalt cluster of formula [CoII3CoIII2(OH)2(piv)6(L)2(H2O)4] (piv = trimethylacetate, H2L = salicylideneanthranillic acid) from reaction of a dinuclear cobalt pivalate precursor with a Schiff base type ligand under mild reaction conditions. The core structure can be conveniently described as two fused Co3–μ3–OH triangles with a strict unique sharing vertex point. A complete picture of the magnetic behaviour of this compound is presented. Through combined use of susceptibility, magnetisation, and EPR data as well as broken-symmetry DFT calculations, we have supported the magnetic data that show weak and anisot…
One dimensional Mn(III) Schiff-base complex organization through very strong symmetrical H-bond interaction
Abstract We are reporting the structural and magnetic characterization of a Mn(III) mononuclear complex based on a Schiff-base ligand with carboxylate pendant arm. Very strong symmetric H-interaction drives a one dimensional organization of this complex, densely packed through C–H⋯π further interactions. Low temperature magnetic behaviour appears governed by local ion zero field splitting obscuring any possible weak exchange interaction through the symmetric H-bond pathway.
Exploring the exchange interaction in a mixed valence {CoII4CoIII2} hexanuclear cluster with novel topology
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…
CCDC 1478937: Experimental Crystal Structure Determination
Related Article: Irene C. Lazzarini, Luca Carrella, Eva Rentschler, Pablo Alborés|2016|Inorg.Chim.Acta|453|692|doi:10.1016/j.ica.2016.09.040
CCDC 977362: Experimental Crystal Structure Determination
Related Article: Irene C. Lazzarini, Alejandro V. Funes, Luca Carrella, Lorenzo Sorace, Eva Rentschler, Pablo Alborés|2014|Eur.J.Inorg.Chem.||2561|doi:10.1002/ejic.201402089