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  • Chem Sci Trans., 2015, 4(3),  pp 806-818  

    DOI:10.7598/cst2015.1045

    Research Article

    Spectroscopic, Characterization and Biological Studies of Pyridine Carboxyamide Complexes

  • BIBHESH K.SINGH1*, HEMANT K. RAJOUR2, REKHA CHAUHAN1 and SAURABH GOYAL1
  • 1 Department of Chemistry, Govt. Postgraduate College, Ranikhet, Uttarakhand-263645, India
    2 Department of Chemistry, Ramjas College, University of Delhi, Delhi-110007, India
  • Abstract

    Newly synthesized carboxyamide ligand N,N`-bis(2-carboxy-1-oxophenelenyl) pyridine 2,6- diamine and their Co(II), Ni(II) and Cu(II) complexes have been synthesized and characterized by various physicochemical techniques. Vibrational spectra indicate coordination of amide and carboxylate oxygen of the ligand. Mass spectrum explains the successive degradation of the molecular species in solution and justifies ML complexes. The electron paramagnetic resonance of the Cu(II) complex shows g║ > g⊥ > 2.03 was observed indicated that unpaired electron most likely reside in the dx2-y2( or less likely a dxy) ground state, which is consistent with the proposed square based geometry. Electronic spectra and magnetic susceptibility measurements reveal square planar geometry for metal complexes. Molecular structure of the complexes has been optimized by MM+ calculations and supports a square planar geometry. The bio-efficacy of the ligands and its metal complexes has been examined against the growth of bacteria in vitro to evaluate their anti-microbial potential.

    Keywords

    Bioactivity, Carboxyamide, Complexes, Spectra, Molecular modeling

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