Condensation of SMDTC with 2-furyl-methylketone and 5-methyl-2-furaldehyde gave isomeric Schiff bases, (NS) and (NS ′). The metal complexes of these uninegatively charged bidentate Schiff base ligands with cadmium, tin, iron, lead and cobalt have been prepared. The complexes have been characterized by a variety of physico-chemical techniques. X-ray crystallographic analysis shows that the Cd(II) complex, bis[ S-methyl-β- N-(2-furylmethylketone)dithiocarbazato]cadmium(II), consists of two molecules with distorted octahedral structure. The Co(II) complexes are paramagnetic with a square-planar stereochemistry. The diamagnetic Sn(II), Fe(III) and Pb(II) complexes also have square-planar structures while the diamagnetic [Cd(NS ′) 2] · 3H 2O complex is tetrahedral. The [Cd(NS ′) 2] · 3H 2O, [Sn(NS) 2] and [Co(NS) 2] showed clear inhibition of almost all bacteria and fungi tested However, [Cd(NS) 2], [Fe(NS)]Cl 2, [Pb(NS) 2] and [Pb(NS ′) 2] were inactive against all bacteria assayed while [Cd(NS) 2], [Fe(NS)]Cl 2 and [Pb(NS) 2] showed clear inhibition of some fungi. The [Cd(NS) 2], [Cd(NS ′) 2] · 3H 2O and [Co(NS) 2] were found to be very active against Human cell T-lymphoblastic leukemia (CEM-SS) and cervical cancer cells (HELA) with CD 50 values between 1.8 and 3.6 μl cm −3.