Studies of Some Salicylidene Schiff Base Complexes of Aryltellurium

Abstract

A novel monobasic tridentate Schiff base Salicylidene-trimethoprim, Sal-TMP, synthesized from trimethoprim and salicylaldehyde, form stable complexes with aryltellurium(IV) trichlorides and diaryltellurium(IV) dichlorides of the type Sal-TMP.ArTeCl₂ and Sal-TMP.Ar₂TeCl (where Ar = p-methoxyphenyl, p-ethoxyphenyl, p-hydroxyphenyl and 3-methyl-4-hydroxyphenyl). These have been characterized by elemental analyses, molar conductance, IR and ¹H NMR spectroscopy. The spectral studies predict the bonding of ligand through phenolic oxygen of Schiff base after deprotonation, nitrogen of the azomethine group and pyrimidine nitrogen to give hexa-coordinated tellurium(IV) complexes. The complexes have also been screened for their antimicrobial activities against various bacteria and fungi organisms.