title: Triangular nickel complexes derived from 2-pyridylcyanoxime: an approach to the magnetic properties of the [Ni3(μ3-OH){pyC(R)NO}3]2+ core.
abstract: A series of nickel complexes with nuclearity ranging from Ni(3) to Ni(6) have been obtained by treatment of a variety of nickel salts with the 2-pyridylcyanoxime ligand. The reported compounds have as a common structural feature the triangular arrangement of nickel cations bridged by a central μ(3)-oxo/alkoxo ligand. These compounds are simultaneously the first nickel derivatives of the 2-pyridylcyanoxime ligand and the first examples of isolated, μ(3)-O triangular pyridyloximate nickel complexes. Magnetic measurements reveal antiferromagnetic interactions promoted by the μ(3)-O and oximato superexchange pathways and comparison of the experimental structural and magnetic data with DFT calculations give an in-depth explanation of the factors that determine the magnetic interaction in this kind of system.
authors.affiliation: Departament de Química Inorgànica, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Esteban
authors.forename: Eliseo
authors.initials: E
authors.lastname: Ruiz
authors.forename: Mercé
authors.initials: M
authors.lastname: Font-Bardia
authors.forename: Teresa
authors.initials: T
authors.lastname: Calvet
authors.forename: Albert
authors.initials: A
authors.lastname: Escuer