Ferromagnetic NiII-GdIII interactions in complexes with NiGd, NiGdNi, and NiGdGdNi cores supported by tripodal ligands

Dinuclear [(NiL)Gd(hfac)(2)(EtOH)] (H3L = 1,1,1-tris(N-salicy-lideneaminomethyl)ethane, Hhfac = hexafluoroacetylacetone), trinuclear [(NiL)(2)Gd(NO3)], and tetranuclear [(NiL)Gd(CH3-CO2)(2)(MeOH)](2) complexes, were prepared by treating [Ni(HL)] with [Gd(hfac)(3)(H2O)(2)], Gd(NO3)(3).6H(2)O, and Gd(CH3CO2)(3).4H(2)O, respectively, in the presence of Et3N. All the complexes show that ferromagnetic interactions occur between the Ni-II and Gd-III ions.