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2 Polish Journal of Chemistry

2 2009

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Synthesis, Characterization and Antifungal Activity of Mono-Oxovanadium(V) Complexes of 4-Phenylphenol

Sharma N., Thakur M., Sagar A., Chaudhry S. C.

Polish Journal of Chemistry

2009

Vol. 83, nr 11

1859-1870

New mono-oxovanadium(V) complexes of composition VOCl3-n(OC6H4-C6H5-4)n (where n = 1 to 3) have been synthesized in quantitative yields by the in-situ reaction of VOCl3 with trimethylsilyl derivative of 4-phenylphenol and characterized by elemental analyses, molar conductance measurements and IR, 1H NMR and mass spectral methods. The reactions of complexes with a variety of nitrogenous bases viz. imidazole and benzimidazole (L); 2,2'-bipyridyl and 1,10-phenanthroline (B) yielded adducts of composition VOCl3-n(OC6H4-C6H5-4)n×2L and VOCl3-n(OC6H4-C6H5-4)n×B, proved by analytical and IR spectral data. The molecular model calculations through optimum energy minimization for the perspective geometry of the complexes have also been computed. The ligand, 4-phenylphenol, as well as the synthesized complexes show growth inhibitory activity against pathogenic fungus Fusarium oxysporum.

Bivalent Tin(II)-4-methoxyphenoxide: Synthesis, Characterization, Reactivity and Antifungal Activity

Chaudhry S. C., Bandna K., Bhatt S. S., Sharma N., Sagar A.

Polish Journal of Chemistry

2009

Vol. 83, nr 3

391-400

Bivalent tin(II)-4-methoxyphenoxide of composition Sn(OC6H4OMe-4)2 (1) has been synthesized from the reaction of SnCl2 with bimolar amounts of 4-methoxyphenol and diethylamine in tetrahydrofuran and characterized by elemental analysis, molar conductance measurement and IR spectral studies. Thermal behaviour of the complex has been studied by TGA-DTA techniques. The reactivity of (1) with HgCl2 has been investigated using potentiometric and cyclic voltammetric technique. Conductometric titration of complex (1) with sodium salt of 4-methoxyphenol suggests the formation of double phenoxide of composition Na2[Sn(OC6H4OMe-4)4]. Addition compounds of composition Sn(OC6H4OMe-4)2ź2L and Sn(OC6H4OMe-4)2źB (L = diethylamine and pyridine; B= l,10-phenanthroline and 2,2'-bipyridyl) have also been prepared and characterized by physicochemical and IR spectral studies. The complex (1) has also been screened for its antifungal activity.