title: Ferromagnetic coupling by orthogonal magnetic orbitals in a heterodinuclear CuIIVIV=O complex and in a homodinuclear CuIICuII complex.
abstract: The heterodinuclear complex [LCuIIVIVO] 1 was synthesized by using a new unsymmetric dinucleating ligand based on 1,8-naphthalenediol, whereas the homodinuclear CuIICuII complex 2 has a bridging beta-diketimineamid unit. Here we report on the synthesis, molecular structures, and magnetic properties of 1 and 2. In the solid state, both complexes dimerize to tetranuclear entities 1(2) and 2(2). The intradimer interaction in both complexes is ferromagnetic because of the orthogonality of the magnetic orbitals (J12 = +45.6 cm(-1) in 1 and +4.8 cm(-1) in 2). The interdimer interaction in 1 is also ferromagnetic, giving a St = 2 ground state.
authors.affiliation: Lehrstuhl Anorganische Chemie I, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany. thorsten.glaser@uni-bielefeld.de
authors.forename: Thorsten
authors.initials: T
authors.lastname: Glaser
authors.forename: Hubert
authors.initials: H
authors.lastname: Theil
authors.forename: Ioannis
authors.initials: I
authors.lastname: Liratzis
authors.forename: Thomas
authors.initials: T
authors.lastname: Weyhermüller
authors.forename: Eckhard
authors.initials: E
authors.lastname: Bill