Abstract
A novel tetranuclear complex, [Cu 4L 4] · Na · ClO 4 ( 1) has been prepared from an interesting multidentate Schiff base ligand H 2L resulting from the 1:1 condensation of 3-methoxysalicylaldehyde with benzhydrazide. The prepared complex has been characterized by elemental analysis, FT-IR, UV–Vis spectroscopy, electrochemical studies and single crystal X-ray diffraction analysis. The Cu 4O 4 cubane core consists of four μ 3-phenoxo-bridged copper(II) atoms giving an approximately cubic array of alternating copper(II) and oxygen atoms. Magneto-structural correlations have been drawn from cryomagnetic susceptibility measurements over a wide range of temperature (2–300 K) under 0.5 T magnetic field. The measurements reveal both ferromagnetic and antiferromagnetic interactions in a 2 J model [ J 11 = +13.6(4) cm −1 and J 12 = −34.9(4) cm −1] which in turn results in an overall antiferromagnetic behaviour of the magnetic system.
Published Version
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