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      https://www.ias.ac.in/article/fulltext/jcsc/119/01/0029-0034

    • Keywords

       

      Cobaloximes; spectroscopic characterization; monodentate coordination.

    • Abstract

       

      Spectroscopic characterization (IR, NMR and electronic spectra) of methyl (ligand) cobaloxime was done, where ligand = pyrazole, dimethyl pyrazole, alanine and alanine methyl ester. The frequency changes in the IR spectra and shifts in the NMR were explained on the basis of basicity of the ligand, steric hindrance, HSAB principle and $d\pi-p\pi$ back-bonding from metal to ligand. Alanine and alanine methyl ester form more stable complexes than pyrazole and dimethyl pyrazole. Based on their IR and 1H NMR spectra it is inferred that pyrazole and dimethylpyrazole bind to Co (III) via N-2 ring nitrogen, i.e. monodentate coordination.

    • Author Affiliations

       

      N Navaneetha1 P A Nagarjun2 S Satyanarayana1

      1. Department of Chemistry, Osmania University, Hyderabad 500 007
      2. Department of Microbiology, Osmania University, Hyderabad 500 007
    • Dates

       
  • Journal of Chemical Sciences | News

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