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Synthesis, spectral, thermal, solid-state DC electrical conductivity and biological studies of Co(II) complexes with Schiff bases derived from 3-substituted-4-amino-5-hydrazino-1,2,4-triazole and substituted salicylaldehydes

Transition Metal Chemistry volume 33, pages 275–283 (2008)Cite this article

Abstract

A series of Co(II) complexes have been synthesized with Schiff bases derived from 3-substituted-4-amino-5-hydrazino-1,2,4-triazole and substituted salicylaldehydes. These complexes are insoluble in water but more soluble in DMF and DMSO. The complexes have been characterized by elemental analyses, spectral (IR, UV–Vis, 1H-NMR, FAB-mass, fluorescence), magnetic, thermal, solid-state DC electrical conductivity and molar conductance data. The molar conductivity values indicate that they are non-electrolytes. The elemental analyses of the complexes suggest a stoichiometry of the type Co · L1–L16 · 2H2O. The complexes have been considered as semiconductors on the basis of the solid-state DC electrical conductivity data. Fluorescence spectra of one Schiff base and its complex were investigated in various solvents and some of the Schiff bases and their complexes were evaluated for their antimicrobial activities.

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Acknowledgements

The authors are grateful to the Chairman, Department of Chemistry, Karnatak University, Dharwad for the facilities. Thanks are also due to Prof. A. Venkataramana, Department of Material Science, Gulbarga University, Gulbarga, for the facilities to obtain solid-state DC electrical conductivity data. Thanks are also due to Mr. Gururaj Rao Department of Biotechnology Gulbarga University, Gulbarga for the facilities to obtain the biological results of synthesized compounds.

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Authors and Affiliations

  1. P.G. Department of Chemistry, Karnatak University, Dharwad, 580 003, India

    Prakash Gouda Avaji & Sangamesh A. Patil

  2. Department of Chemistry, Shri Sharanabasaveshwar College of Science, Gulbarga, 585 102, India

    Prema S. Badami

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  1. Prakash Gouda Avaji
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  2. Sangamesh A. Patil
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  3. Prema S. Badami
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Correspondence to Sangamesh A. Patil.

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Avaji, P.G., Patil, S.A. & Badami, P.S. Synthesis, spectral, thermal, solid-state DC electrical conductivity and biological studies of Co(II) complexes with Schiff bases derived from 3-substituted-4-amino-5-hydrazino-1,2,4-triazole and substituted salicylaldehydes. Transition Met Chem 33, 275–283 (2008). https://doi.org/10.1007/s11243-007-9041-z

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Keywords

  • Schiff Base
  • Triazole
  • Molar Conductance
  • Octahedral Complex
  • Medium Intensity Band