title: Initial use of dioximate ligands in 3d/4f cluster chemistry: synthesis, structure, and magnetic studies of an unusual [Gd(III)2Mn(IV)O]8+ complex.
abstract: An unusual [Mn(IV)Gd(III)(2)(mu(3)-O(2-))](8+) triangular complex has been prepared from the initial use of 2,6-diacetylpyridine dioxime (dapdoH(2)) in 3d/4f cluster chemistry. The complex has an S = (13)/(2) ground state, with exchange parameters J = +0.49 cm(-1) and J' = -0.12 cm(-1) [H = -2J(S(i) x S(j)) convention] for the Gd(III)...Mn(IV) and Gd(III)...Gd(III) interactions, respectively. The origin of this ground state has been rationalized by consideration of the spin frustration occurring within the complex as a function of the relative magnitude of the competing interactions.
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
authors.forename: Christos
authors.initials: C
authors.lastname: Lampropoulos
authors.forename: Theocharis C
authors.initials: TC
authors.lastname: Stamatatos
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
authors.forename: George
authors.initials: G
authors.lastname: Christou