Synthesis, characterization and biocidal activities of some metal(II) complexes with diacetyl salicylaldehyde acyldihydrazones
- 10 September 2006
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Coordination Chemistry
- Vol. 59 (13), 1483-1494
- https://doi.org/10.1080/00958970600561035
Abstract
Complexes of diacetyl salicylaldehyde oxalic acid dihydrazone, CH3COC(CH3)= NNHCOCONHN=CHC6H4(OH),(dsodh) and diacetyl salicylaldehyde malonic acid dihydrazone CH3COC(CH3)=NNHCOCH2CONHN=CHC6H4(OH), (dsmdh) of general compositions [M(L)]Cl, [M′(L)Cl], [M(L′)]Cl and [M′(L′)Cl] (where M = Co(II), Cu(II), Zn(II), Cd(II) and M′ = Ni(II); HL = dsodh and HL′ = dsmdh) were prepared and characterized by elemental analyses, molar conductance, magnetic moments, electronic, ESR and infrared spectra and X-ray diffraction data. The magnetic moments and electronic spectra indicate six-coordinate octahedral geometry for Co(II) and square planar geometry for Ni(II) complexes. The ESR spectral data of Cu(II) complexes in DMF solution reveal a tetragonally distorted octahedral geometry. Both ligands bond through >C=O, >C=N and deprotonated phenolate groups in all octahedral complexes and through >C=N and deprotonated phenolate groups in Ni(II) square planar complexes. The lattice parameters for Cu(dsodh) and Co(dsmdh) correspond to an orthorhombic and Ni(dsodh) corresponds to a tetragonal crystal lattice. The complexes show significant antifungal activity against a number of pathogenic fungi viz. Stemphylium, Myrothecium and Alternaria. The antibacterial activity was studied against Pseudomonas fluorescence (gram −ve) and Clostridium thermocellum (gram +ve).Keywords
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