INTRODUCTIONSchiff bases have been used as chelating ligands in the field of co-ordination chemistry and their metal complexes are of great interest for many years It is well known that N and S atoms play a key role in the co-ordination of metals at the active sites of numerous metallobiomolecules Where M=Mn III and Mn II. The adducts have been characterized on the basis of elemental analyses molar conductance, I.R , visible spectra, magnetic susceptibility measurement and TGA. The ligands behave in dibasic tridentate manner in 5-methyl2-hydroxyacetophenon emorpholine-N-thiohydrazone and 5-chloro2-hydroxyacetophenonemorpholine-N-thiohydrazone. While5-methyl2hydroxyacetoph enoneantipyrine behaves in monobasic tridentate manner. All these compounds are paramagnetic in nature and have octahedral geometry.

Compounds containing imines bases have not only found extensive application in organic synthesis, but several of these molecules display significant biological activity [1][2][3][4] . In the last decade Schiff base ligands have received more attention mainly because of their wide application of in the field of catalysis and due to their antimicrobial ABSTRACTThe Schiff bases 5-methyl2-hydroxyacetophenonemorpholine-N-thiohydrazide, 5-methyl2-hydroxyacetophenoneantipyrine,5chloro2hydroxyacetophenonemorpholine-N-thiohydrazone has reacted with V(III) and VO(IV) to form co-ordination compounds having general

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