Synthesis, structural studies and bio-activity of some metal(II) complexes with glyoxal salicylaldehyde acyldihydrazones
Title:
Synthesis, structural studies and bio-activity of some metal(II) complexes with glyoxal salicylaldehyde acyldihydrazones
Author:
Singh, Vinod P. Gupta, Parul
Appeared in:
Journal of coordination chemistry
Paging:
Volume 61 (2008) nr. 10 pages 1532-1544
Year:
2008
Contents:
Complexes of the type [M(gssdh)]Cl and [M(gspdh)]Cl, where M = Co(II), Ni(II), Cu(II), Zn(II) and Cd(II), Hgssdh = glyoxal salicylaldehyde succinic acid dihydrazone and Hgspdh = glyoxal salicylaldehyde phthalic acid dihydrazone, have been synthesized and characterized by elemental analyses, molar conductance, magnetic moments, electronic, ESR and IR spectra and X-ray powder diffraction studies. The metal complexes are insoluble in common organic solvents and are 1 : 1 electrolytes. The magnetic moment values and electronic spectra indicate a spin-free octahedral geometry for all Co(II), Ni(II) and Cu(II) complexes. ESR spectral parameters of Cu(II) complexes suggest an elongated tetragonally-distorted octahedral stereochemistry around copper. Both ligands are monobasic hexadentate ligands coordinating through three >C=O, two >C=N- and a deprotonated phenolate group to the metal. X-ray powder diffraction parameters for three of the complexes correspond to an orthorhombic crystal lattice. The complexes show appreciable activity against various fungi and bacteria.
Journal description