Synthesis, spectral characterization and in vitro microbiological evaluation of novel glyoxal, biacetyl and benzil bis-hydrazone macrocyclic Schiff bases and their Co(II), Ni(II) and Cu(II) complexes

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Lakshmi, B. and Avaji, P.G. and Shivananda, K.N. and Nagella, P. and Manohar, S.H. and Mahendra, K.N. (2011) Synthesis, spectral characterization and in vitro microbiological evaluation of novel glyoxal, biacetyl and benzil bis-hydrazone macrocyclic Schiff bases and their Co(II), Ni(II) and Cu(II) complexes. Polyhedron, 30 (9). pp. 1507-1515. ISSN 02775387

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Official URL: https://doi.org/10.1016/j.poly.2011.03.016

Abstract

A series of binuclear Co(II), Ni(II) and Cu(II) complexes were synthesized by the template condensation of glyoxal, biacetyl or benzil bis-hydrazide, 2,6-diformyl-4-methylphenol and Co(II), Ni(II) or Cu(II) chloride in a 2:2:2 M ratio in ethanol. These 22-membered macrocyclic complexes were characterized by elemental analyses, magnetic, molar conductance, spectral, thermal and fluorescence studies. Elemental analyses suggest the complexes have a 2:1 stoichiometry of the type M2LX2·nH2O and Ni2LX22H2O·nH2O (where M = Co(II) and Cu(II); L = H2L1, H2L 2 and H2L3; X = Cl; n = 2). From the spectroscopic and magnetic studies, it has been concluded that the Co(II) and Cu(II) complexes display a five coordinated square pyramidal geometry and the Ni(II) complexes have a six coordinated octahedral geometry. The Schiff bases and their metal complexes have also been screened for their antibacterial and antifungal activities by the MIC method. © 2011 Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: cited By 9
Subjects: Faculty of Science > Pure Sciences > Chemistry
Divisions: Jnana Bharathi / Central College Campus > Department of Chemistry
Depositing User: Mr. Kirana Kumar D
Date Deposited: 01 Apr 2016 10:31
Last Modified: 01 Apr 2016 10:31
URI: http://eprints-bangaloreuniversity.in/id/eprint/2493

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