Abstract

Complexes of Cr(III), Mn(II) and Co(II) with a tetradentate macrocyclic ligand i.e. 2,6,12,16,21,22-hexaaza;3,5,13,15-tetraphenyltricyclo[15,3,1,17–11]docosa;1(21),2,5, 7,9,11(22),12,15,17,19-decaene (L). These complexes were characterized by elemental analysis, molar conductance measurements, magnetic susceptibitity measurements, mass, 1H NMR, IR, electronic and EPR spectral studies. These spectral studies suggest an octahedral geometry for Cr(III), Mn(II) and Co(II) complexes. The ligand and its complexes have been screened in vitro against some species of bacteria and plant pathogenic fungi.

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