• Reaction of coordinated ligand-IV. Synthesis and characterization of some lanthanide complexes of 2,6-diacetylpyridine 2-thenoyl salicyl dihydrazone

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      https://www.ias.ac.in/article/fulltext/jcsc/110/04/0421-0432

    • Keywords

       

      Reaction of coordinated ligand; asymmetrical hydrazone; lanthanide

    • Abstract

       

      The complexes of the type [Ln(H2 dapthsh)Cl(H2O)2]Cl2 (Ln=La, Pr, Nd, Sm, Eu, Gd, Tb and Dy; H2 dapthsh=2,6-diacetylpyridine 2-thenoyl salicyl dihydrazone) have been prepared by reacting salicylhydrazone (sh) with [Ln(Hdapth)Cl2(H2O)3]Cl (Hdapth=2,6-diacetylpyridine mono (2-thenoylhydrazone) in ethanol. The condensation of coordinated acetyl C=O with — NH2 of salicylhydrazone occurs and the resulting azomethine nitrogen is found bonded to the Ln(III) ions. The compound has been found monomeric from FAB mass spectra. The bonding sites of the dihydrazone and coordination number and symmetry of the ligand field around Ln3+ ions have been deduced from IR, electronic and emission spectra.

    • Author Affiliations

       

      B Singh1 T B Singh1

      1. Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi - 221 005, India
    • Dates

       
  • Journal of Chemical Sciences | News

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