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Vol. 29 No. 3 (2017): Vol 29 Issue 3

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Synthesis, Characterization and Antimicrobial Activities of Organotin(IV) Complexes of Schiff Bases Derived from 2,3-Diaminopyridine

https://doi.org/10.14233/ajchem.2017.20227
Aarti Ahlawat
Department of Chemistry, Guru Jambheshwar University of Science & Technology, Hisar-125 001, India
Sonika Asija
Department of Chemistry, Guru Jambheshwar University of Science & Technology, Hisar-125 001, India
Namita Singh
Department of Bio and Nanotechnology, Guru Jambheshwar University of Science & Technology, Hisar-125 001, India

Corresponding Author(s) : Aarti Ahlawat

sc_ic2001@yahoo.co.in; aarti.chem4812@gmail.com

Asian Journal of Chemistry, Vol. 29 No. 3 (2017): Vol 29 Issue 3

Abstract

A series of hexa-coordinated organotin(IV) complexes of type R2SnLn [R = Ph, Bu, Et, Me] has been synthesized from Schiff base ligands (H2L1-3) derived from 2,3-diaminopyridine and 2-hydroxy-1-naphthaldehyde, salicylaldehyde, 5-bromosalicylaldehyde (where H2L1 = 2,2'-(1E,1'E)-(pyridine-2,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)dinaphthalen-1-ol, H2L2 = 2,2'-(1E,1'E)-(pyridine-2,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)diphenol, H2L3 = 2,2'-(1E,1'E)-(pyridine-2,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)bis(4-bromophenol) under inert atmosphere in 1:2 molar ratio. The bonding behaviour, composition and the structural assignment of the synthesized organotin complexes have been characterized by the spectroscopic analysis (1H, 13C and 119Sn NMR, FT-IR, electronic spectra) and elemental analysis. The coordination of the synthesized complexes has been anticipated as hexa-coordinated with the tin atom with ONNO donor system and the ligands are coordinated to the tin atom as tetradentate. The prepared Schiff base ligands and their organotin complexes are evaluated for the antibacterial and antifungal activities against Gram-positive, Gram-negative bacteria and fungi. The complexes show more biological potency in the antimicrobial activities as compared to the ligands.

Keywords

Schiff base ligands Organotin complexes Antimicrobial activities
Ahlawat, A., Asija, S., & Singh, N. (2017). Synthesis, Characterization and Antimicrobial Activities of Organotin(IV) Complexes of Schiff Bases Derived from 2,3-Diaminopyridine. Asian Journal of Chemistry, 29(3), 669–674. https://doi.org/10.14233/ajchem.2017.20227
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