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E-Journal of Chemistry
Volume 2, Issue 1, Pages 21-29

Synthesis, Spectral, Magnetic and Thermal Studies of the Complexes of CoII and NiII With Some Bidentate and Tridentate Hydrazone Ligands

Chetan K. Modi,1 Ashwin S. Patel,2 and Bharat T. Thaker3

1Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388 120, India
2Department of Chemistry, Navyug Science College, Rander Road, Surat 395 009, India
3Department of Chemistry, Veer Narmad South Gujarat University, Surat 395 007, India

Received 5 November 2004; Accepted 14 December 2004

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The reaction of Co(NO3)2.6H2O and Ni(NO3)2.6H2O with hydrazones derived from 1-phenyl-3-methyl-4-acyl-5-pyrazolone (where acyl = acetyl, propionyl, butyryl and benzoyl) with 2-picolinic acid hydrazide have been studied and characterized on the basis of elemental analysis, magnetic moments, molar conductivity measurements, IR and electronic spectral studies and thermogravimetric analysis. Various ligand field parameters have been calculated. Electronic spectral data and the magnetic moment values suggest an octahedral structure for all cobalt(II) and nickel(II) complexes.