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Keywords
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Mn(II) complex, Magnetic studies, Crystal structure, Spectroscopic studies, TGA analysis
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Abstract
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A new tetranuclear complex of Mn(II), [Mn4(L)2(CH3OH)2(μ-N3)4(N3)2] ∙ 2(CH3OH) (1), was synthesized and
characterized by spectroscopic methods, single-crystal X-ray diffraction analysis and TGA analysis where HL is
bis-[(E)-N′-(phenyl(pyridin-2-yl)methylene)]carbohydrazide. Single crystal X-ray analysis reveals that 1 has a
Mn4 core inwhichMn(II) ions are connected by azide and enolate oxygen atoms. IR spectroscopy and X-ray analysis
indicate that the carbohydrazone is coordinated to themetal cores as amononegative ligand in the enol form.
The magnetic behavior of 1was investigated between 2 and 295 K and indicated that the magnetic coupling mediated
via azide bridge is ferromagnetic whereas the enolate oxygen mediates antiferromagnetic coupling that
leads to overall antiferromagnetic behavior.
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