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Coordination of Tellurium(IV) with Schiff Base Derived from o-Vanillin and 3-Aminopyridine

Malik A, Goyat G, Vikas K, Verma KK and Garg S

Seven new organyltellurium(IV) complexes with monobasic ON bidentate Schiff base ligand have been synthesized. The Schiff base ligand (3-APY-{o-VanH}) was prepared by condensation of o-vanillin with 3-aminopyridine. The newly synthesized organyltellurium(IV) complexes and Schiff base have been characterized by elemental analyses, conductivity measurements, FT-IR and 1H NMR spectral studies. The structure of the complexes obtained was confirmed by FT-IR and proton NMR which exhibited pentacoordinated tellurium centre having Ψ-trigonal bipyramidal geometry. Schiff base as well as their organyltellurium(IV) complexes were also evaluated for their antimicrobial activities in vitro against Gram-positive bacteria (Staphylococcus aureus and Streptococcus pyogenes), Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli) and fungii Candida albicans, Aspergillus niger and Aspergillus