6533b7d9fe1ef96bd126bfe7

RESEARCH PRODUCT

Structural and magnetic properties of polynuclear oximate copper complexes with different topologies

Ricardo GonzálezRaúl ChiozzoneFrancesc LloretCarlos KremerCarla BazzicalupiAntonio BianchiLorena Martínez

subject

chemistry.chemical_classificationKetoneAntisymmetric exchange010405 organic chemistryLigandInorganic chemistrychemistry.chemical_element010402 general chemistryOxime01 natural sciencesCopper0104 chemical scienceslaw.inventionInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryFerromagnetismlawMaterials ChemistryAntiferromagnetismPhysical and Theoretical ChemistryElectron paramagnetic resonance

description

Abstract Two new copper(II) complexes containing the methyl(2-pyridyl)ketone oxime ligand (mpkoH) [Cu3(OH)(ClO4)2(mpko)3]·CH3OH (1) and [Cu(ClO4)(mpko)(mpkoH)]n (2) have been prepared from Cu(ClO4)2 and mpkoH in different metal-to-ligand molar ratios. In addition, the compound [Cu{(mpko)2BF2}(H2O)](BF4) (3) [(mpko)2BF2 is the fluoroboration product of the oxime] has been obtained when replacing Cu(ClO4)2 by Cu(BF4)2. Compound 1 is an isolated triangle with a {Cu3(µ3-OH)}5+ core, whereas 2 is a chain of CuII ions linked by anionic mpko− bridges. 1 exhibits strong antiferromagnetic competing interactions, as well as antisymmetric exchange. On the other hand, very weak ferromagnetic interactions are found in 2. The magnetic properties of these compounds have been analyzed by magnetic measurements and EPR spectra.

yearjournalcountryeditionlanguage
2017-12-01Polyhedron
https://doi.org/10.1016/j.poly.2017.09.017