Author： Murukan Balakrishnan Mohanan Kochukittan
Publisher： Informa Healthcare
ISSN： 1475-6366
Source： Journal of Enzyme Inhibition and Medicinal Chemistry, Vol.22, Iss.1, 2007-02, pp. : 65-70
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Abstract
Complexes of manganese(III), iron(III) and cobalt(III) with a bishydrazone, formed by condensation of isatin monohydrazone with 2-hydroxy-1-naphthaldehyde, have been synthesized. The spectral data reveal that the ligand acts as monobasic tridentate, coordinating through the deprotonated naphtholate oxygen, azomethine nitrogen, and carbonyl oxygen. Molar conductance values adequately support the electrolytic nature of the complexes. On the basis of the above observations the complexes have been formulated as [M(NIB)2]X where M = Mn(III), Fe(III) or Co(III); X = Cl- , NO3- or OAc- ; HNIB = [(2-hydroxy-1-naphthaldehyde)-3-isatin]-bishydrazone. Based on electronic spectral data and magnetic moment values, an octahedral geometry has been proposed. The iron(III) complex has been subjected to thermal decomposition studies. The ligand and the metal complexes have been screened for their antibacterial activity and it has been observed that the complexes are more potent bactericides than the ligand.
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