Programme Book - UPM - Universiti Putra Malaysia

P58 SYNTHESIS AND CHARACTERISATION OF SCHIFFBASES DERIVED FROM S-2-METHYLBENZYLDITHIOCARBAZATE AND ITS METALCOMPLEXESY.J. Chan, M. H. Sazali, N.H. Hanan, S. Hatta, M. Ibrahim M. Tahir*Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPMSerdang, Selangor, MalaysiaCorresponding author: ibra@upm.edu.mySchiff base is an imine, RCH=NR’, which is formed by the reaction of an aldehyde ora ketone with a primary amine, RNH 2 in a slightly acidic condition. New Schiff baseswere synthesized through the condensation of S-2-methylbenzyldithiocarbazate,S2MBDTC with 4-chlorobenzaldehyde, chalcone, 4-4-acetoxyphenyl-2-butanone andacetophenone. Reaction of these Schiff bases with zinc acetate dihydrate producedmetal complexes with proposed empirical formula [M(SB) 2 ] (SB = Schiff bases, M =Zn 2+ ). The synthesized Schiff bases were found to coordinate to the zinc (II) ionthrough its azomethine nitrogen and thiolo sulphur. All of the synthesized compoundswere characterized by a variety of physicochemical and spectroscopic techniquesincluding elemental analyses, molar conductivity, magnetic susceptibilitymeasurement, infrared spectroscopy, 1 H and 13 C NMR and mass spectra. IR spectrashowed that Schiff base coordinated to the zinc (II) ion through azomethine nitrogenand thiolo sulphur. The bidentate coordination of Schiff bases to zinc (II) ion wereconfirmed by ICP-AES analysis which show metal to ligand ratio at 1:2. Molarconductivity measurement indicates that the metal complexes were non-electrolyte insolvent DMSO.73 |16 th Industrial Chemistry Seminar: Chemistry- A Passport to a Brighter Future