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Studies on the effect of picolines on the stereochemistry of Lanthanide (III) Nitrate coordination compounds of 4[N-Furfural) amino] antipyrine semicarbazone and antibacterial activities

Agarwal, Ram K. and Agarwal, H. and Prasad, Surendra and Kumar, A. (2011) Studies on the effect of picolines on the stereochemistry of Lanthanide (III) Nitrate coordination compounds of 4[N-Furfural) amino] antipyrine semicarbazone and antibacterial activities. Journal of the Korean Chemical Society, 55 (4). pp. 594-602. ISSN 1017-2548

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      Abstract

      The effect of α-, β- and γ-picolines on the stereochemistry of the coordination compounds of lanthanide(III) nitrates derived from 4[N-(furfural)amino]antipyrine semicarbazone (FFAAPS) has been studied. The general composition of the present coordination compounds is [Ln(FFAAPS)(NO3)3Pic] (Ln=La, Pr, Nd, Sm, Gd, Tb, Dy or Ho and Pic=α-, β- or γ-picolines). All these coordination compounds have been characterized by elemental analyses, molecular weight, molar conductance, magnetic susceptibility, infrared and electronic spectra. The infrared studies suggest that the FFAAPS behaves as a neutral tridentate ligand with N, N, O donor while α-, β- or γ-picoline is coordinated to the lanthanide(III) ions via heterocyclic N-atom. Nitrates are bicovalently bonded in these compounds. From the electronic spectral data, nephelauxetic effect (β), covalence factor (b1/2), Sinha parameter (δ%) and the covalence angular overlap parameter (η) have been calculated. Thermal stabilities of these complexes have been studied by thermogravimetric analysis. The coordination number of lanthanide(III) ions in the present compound is found to be ten. The antibacterial studies screening of the primary ligand FFAAPS and the complexes showed that the present complexes have moderate antibacterial activities.

      Item Type: Journal Article
      Subjects: Q Science > QD Chemistry
      Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
      Depositing User: Ms Shalni Sanjana
      Date Deposited: 31 Jul 2011 13:53
      Last Modified: 04 Oct 2013 13:24
      URI: http://repository.usp.ac.fj/id/eprint/4998
      UNSPECIFIED

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