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Synthesis, structural elucidation and antimicrobial effectiveness of coordination entities of cobalt (II) and nickel (II) derived from 9,17-diaza-2,6,11,15-tetrathia-1,7,10,16-(1,2)-tetrabenzenacyclooctadecaphan-8,17-diene

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Author(s): Rajiv Kumar | Rajni Johar | Anil Krishan Aggarwal

Journal: European Journal of Chemistry
ISSN 2153-2249

Volume: 3;
Issue: 1;
Start page: 57;
Date: 2012;
Original page

Keywords: EPR | Antimicrobial | Molecular modeling | Potential separation | Splitting parameters | Coordination entities

ABSTRACT
9,17-Diaza-2,6,11,15-tetrathia-1,7,10,16-(1,2)-tetrabenzenacyclooctadecaphan-8,17-diene, macrocycle was synthesized, thereafter formulation and designing strategies applied for the preparation of coordination entities of Co(II) and Ni(II). Coordination behaviour of N2S4 donor macrocycle towards metal ion(s) was assessed by physiochemical measurements and spectral investigations viz. elemental analysis, molar conductance, magnetic susceptibility measurements, infrared, UV-Vis, 1H and 13 C NMR, mass spectroscopy, electron paramagnetic resonance (EPR), cyclic voltammetry and molecular modeling. Side-by-side comparison of the spectral findings exposed different geometrical aspects of macrocycle and coordination entities. Cyclic voltammogram showed fully oxidized and reduced species in one unified experiment. Macrocycle and coordination entities were screened for antimicrobial effectiveness (antifungal properties against Aspergillus-niger).
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