title: Ferromagnetic heteronuclear {Fe4(Er,Lu)2} cyclic coordination clusters based on ferric wheels.
abstract: A new family of hexanuclear ferric-lanthanide [Fe(III)(4)Ln(III)(2)(Htea)(4)(Piv)(6)(N(3))(4)] clusters, where Ln(III) = Er(1) and Lu(2) is reported. Variable temperature solid-state magnetic susceptibility studies of 1 and 2 reveal the presence of ferromagnetic (1) or competing anti- and ferromagnetic exchange interactions (2) between the constituent Fe(III) ions.
authors.affiliation: Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76128 Karlsruhe, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schmidt
authors.forename: Denis
authors.initials: D
authors.lastname: Prodius
authors.forename: Ghenadie
authors.initials: G
authors.lastname: Novitchi
authors.forename: Valeriu
authors.initials: V
authors.lastname: Mereacre
authors.forename: George E
authors.initials: GE
authors.lastname: Kostakis
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell