Tetranuclear Complexes With {M4o4} (M = Co-Ii, Ni-Ii) Cubane-Like Core: Synthesis, Crystal Structure, And Magnetic Properties

Two tetranuclear clusters of formula [M4L4(HOMe)(4)] {H2L = (E)-1-[(2-(hydroxymethyl)phenylimino) methyl]naphthalen-2-ol} [M = Co (1), Ni (2)] were hydrothermally synthesized by reaction of M(OAc)(2)center dot 4H(2)O with H2L and NaOH in MeOH. X-ray crystal structure analysis revealed that complexes 1 and 2 are isostructural. In the core of the structures, four M-II ions and four oxygen atoms occupied alternate vertices of [M4O4] cubane. The magnetic property measurements of 1 and 2 revealed that overall ferromagnetic M-II center dot center dot center dot M-II exchange interactions exist in both complexes.