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13.
Spectroscopic Characterization and Thermal Studies of Bioactive
Nickel(II) and Palladium(II) Complexes with Schiff Base Ligands
Bibhesh K.Singh1*, Anant Prakash1,
Hemant K. Rajor2, Narendar Bhojak3
1Inorganic & Bioinorganic Research Lab,
Department of Chemistry, Govt. Post Graduate College, Ranikhet-263645
(Uttarakhand) India
2Department of Chemistry, Ramjas College, University of Delhi,
Delhi-110007, India
3Department of Chemistry, Dunger College, Bikaner University,
Bikaner, Rajasthan, India
*Author for correspondence, E-mail:
bibheshksingh@yahoo.co.in
Tel/Fax:+91-5966-220372 Mobile:+91-9760014796
Abstract:
The new series of nickel(II) and palladium(II) complexes with
different bidentate Schiff base ligands have been prepared and
characterized by various spectroscopic as well as thermal
studies. An infrared spectrum indicates coordination of metal
ions through azomethine nitrogen and acetate/nitrate ions. The
presence of water molecule(s) in the complexes has been
supported by TG/DTA studies. Mass spectrum explains the
successive degradation of the molecular species in solution and
justifies ML complexes. Kinetic and thermodynamic parameters
were computed from the thermal data using Coats and Redfern
method, which confirm first order kinetics. The bio-efficacy of
the complexes has been examined against the growth of bacteria
in vitro to evaluate their anti-microbial potential. Molecular
structure of the complexes has been optimized by MM2
calculations and suggests an octahedral/ square planar geometry.
Key words: Biological activities, Metal complexes, Molecular
mechanics, Schiff base.
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