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.
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.
Lampropoulos
Christos
C
Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
Stamatatos
Theocharis C
TC
Abboud
Khalil A
KA
Christou
George
G