Synthesis, Characterization and Antimicrobial Activity of Novel Schiff's Base Complexes of some Transition Metal Ions.

Condensation of p-methyl thioaniline with salicylaldehyde gives a novel Schiff base which gives trischelate octahedral complexes with Fe(II), Co(II), Ni(II) and Ru(III) metal ions and bis chelate diaqua octahedral complex with Cu(II) ion. They have been characterized by magnetic susceptibility measurements, electronic spectroscopy, IR, ¹H NMR and ¹³C NMR techniques. Their electrochemical properties have been studied. Some of these complexes have been found to be effective antimicrobials against some selected Gram (+) and Gram (−) bacteria and fungi. Their ligand field parameters such a 10Dq, LFSE, Racah parameter β have been calculated to assess the strength and covalency of M-L bond.