Abstract
Abstract The magnetic susceptibility measurement down to the liquid helium temperature and the single-crystal X-ray analysis of alkoxo-oxygen bridged tetranuclear copper(II) complex [CuL]4 have been performed, where H2L is a tridentate ligand derived from condensation of 3-ethoxymethylene-2,4-pentanedione and 2-aminoethanol. The magnetic data demonstrated that the four unpaired electrons of the four copper(II) ions are ferromagnetically coupled, the ground spin state of the cubane molecule being S=2. The structural analysis has confirmed several structural features, i.e., the distorted Cu4O4 cubane structure, the square pyramidal coordination geometry, nearly perpendicular arrengement between adjacent basal coordination planes, and inequivalent Cu–O bond distances.
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