title: Rational design of a covalently tethered dinuclear [MnII(N3O2)Cl(OH2)]2(2+) macrocyclic building block: synthesis, structure, and magnetic properties.
abstract: A novel dimeric MnII complex {[Mn(N3O2)]Cl(OH2)}(2)2Cl (2) of a macrocyclic Schiff base ligand derived from the condensation of 2,2',6,6'-tetraacetyl-4,4'-bipyridine with 3,6-dioxaoctane-1,8-diamine in the presence of a stoichiometric amount of MnII has been prepared and characterized. The X-ray analysis of 2 reveals that the two Mn ions assume a pentagonal-bipyramidal geometry, with the macrocycle occupying the pentagonal plane and the axial positions being filled by a halide ion and a H2O molecule. Magnetic susceptibility data (2-270 K) reveal the occurrence of weak antiferromagnetic interactions between covalently tethered MnII-MnII dimeric units.
authors.affiliation: Department of Chemistry, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1 Ontario, Canada.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Brianna
authors.initials: B
authors.lastname: Slater
authors.forename: Antonio
authors.initials: A
authors.lastname: Alberola
authors.forename: Helen
authors.initials: H
authors.lastname: Stoeckli-Evans
authors.forename: Fereidoon S
authors.initials: FS
authors.lastname: Razavi
authors.forename: Melanie
authors.initials: M
authors.lastname: Pilkington