SYNTHESIS AND SPECTROSCOPIC STUDIES (MOSSBAUER, IR AND NMR) OF BIOLOGICALLY-ACTIVE ORGANOTIN(IV) COMPLEXES OF SCHIFF-BASES DERIVED FROM 2-AMINO-5-PHENYL-1,3,4-OXADIAZOLE

A few new organotin(IV) complexes of tridentate (ONN) over bar donor S chiff bases of salicylaldehyde, 4-hydroxybenzaldehyde, 2-hydroxyacetop henone, 4-hydroxyacetophenone with 2-amino-5-phenyl-1,3,4-oxadiazole h ave been synthesised and characterised by elemental analyses, H-1 NMR, UV, IR and Mossbauer spectroscopic studies show hexa-coordination abo ut the tin atom which is arranged in a distorted octahedral geometry. Representative complexes have been screened for their fungicidal as we ll as bactericidal activity and found to be quite active.