Cu(II) complexes of α-oximinoacetoacetarylamide thiosemicarbazones

Dimeric Cu(II) complexes of thiosemicarbaznes derived from α-oximinoacetoacetanilide (OAATS), α-oximinoacetoacet-o-toluidide (OAOTTS), α-oximinoacetoacet-p-toluidide (OAPTTS), α-oximinoacetoacet-o-anisidide (OAOATS), α-oximinoacetoacet-p-anisidide (OAPATS), α-oximinoacetoacet-o-chloroanilde (OAOCATS), α-oximinoacetoacet-m-chloroanilide (OAMCATS), α-oximinoacetoacet-p-chloroanilide (OAPCATS) and α-oximinoacetoacet-m-(2,4)xylidide (OAMXTS) having general formula [CuL]2 are characterised by elemental analyses, IR, ESR and Reflectance spectra and magnetic susceptibilities. From the IR spectra of the complexes it is concluded that thiosemicarbazones coordinate through oxygen of oximino group and 1-nitrogen and sulphur of of thiosemicarbazide moiety, acting as tridentate ligands. The dimeric nature of the complexes is revealed by lowering in magnetic moments at room temperature (μeff = 1.25–1.51 B.M.). The reflectance and ESR spectra have also been discussed to understand the nature of bonding in the complexes.