SYNTHESIS, CHARACTERIZATION AND ANTIFUNGAL STUDIES ON CHROMIUM(III), MANGANESE(III), IRON(III) AND COBALT(III) COMPLEXES WITH THIOHYDANTOINS.

A series of metal complexes of Cr(III), Mn(III), Fe(III) and Co(III) with 1-aryl-2-thiohydantoin having composition [M(L)3] (M=Cr(III), Mn(III), Fe(III) and Co(III); LH= 1-phenl/o-methylphenyl/o-chlorophenyl/o-bromophenyl-2-thiohydantoin) are prepared and characterized on the basis of elemental analyses, electrical conductance, magnetic moment, spectral (electronic, IR, PMR) data. The magnetic moment and electronic spectral data suggest an octahedral geometry around the central metal ion. The molar conductance of complexes is an indicative of their non-electrolytic nature. IR and PMR data indicate that the ligands act as bidentate chelating agents, coordinating through thiolsulphur and azomethine nitrogen. The antifungal activity screening against Colletotrichum falcatum, Fusarium oxysporum and Curvularia pallescence show that the complexes are more potent in comparison with free ligands