Abstract : New tri organotin complexes have been effectively produced in the presence of sodium hydroxide by condensation processes of cephalexin (ligand) and tri-organotin (IV) chloride of (phenyl, butyl and methyl). The product were distinguished by Fourier transform infrared spectroscopy, nuclear magnetic resonance (1H, 13C, 119Sn), and elemental analysis. Based on the spectrum measurements, the complexes produced were given a trigonal bipyramidal shape. The antioxidant ability of Sn(IV) complexes was investigated using two different methods, radical - scavenging activities (DPPH) and the CUPRAC assays. Due to the obvious metal moiety, organotin (IV) complexes had stronger antioxidants than ligands, whereas complex of (Me3SnL) had more significant antioxidant activity than most other complexes.