Ferro- and antiferromagnetic interactions in face-sharing trioctahedral (NiMnNiII)-Mn-II-Ni-II and (NiFeNiII)-Fe-II-Ni-III complexes with the same 1-5/2-1 spin system

摘要

Two heterotrinuclear complexes, [Mn-II((NiL)-L-II)(2)]center dot 2CH(3)OH (where H3L=1,1,1-tris(N-salicylideneaminomethyl) ethane) and [Fe-III(Ni L-II)(2)]NO(3)center dot C2H5OH, consisting of three face-sharing octahedra have been prepared; although these complexes have closely related structures and have the same 1-5/2-1 spin system, they show completely different magnetic interactions between the adjacent metal ions: ferromagnetic (Ni-II-Mn-II) and antiferromagnetic (Ni-II-Fe-III).