53 The unprecedented growth and development of sulfur-nitrogen (S-N) ring compounds began with the considerable rise in scien- tific interest for the discovery of their metallic and superconduct- ing properties [1,2]. Quite large number of studies of these ring systems have been made and diverse reports have ascertained their relevance in the field of nanotechnology [3], electrical and elec- tronics engineering [4-6], medicine [5], industrial and military applications [5]. One factor that has favored S-N ring compounds is the strong π-electron delocalization pattern of -S=N-units which is driven by efficient overlap of pπ orbitals of S and N coupled with the high electronegativities of nitrogen and sulfur [7]. The aforementioned factor spurred the discovery of theoretical calcula- tions [8] to come up with electronic factors that explained the ther- modynamic [7] and kinetic responses from S-N containing ring systems which have resulted in a unique magnetic [9 ] and con- ducting properties [10]. Redox-active heterocycles are candidates for catalysis, sensing and optical materials [11]. In the presence of substituents of differ- ent sizes and orientations, the redox potentials of S-N containing rings and other ring systems are tuned within a certain redox po- tential window [12-15] , resulting in enhanced electron transfer rates, redox potentials [16] and other related parameters such as activation energy [17] by appreciable factors. Moreover, the im- portance of substituent effects in the stabilization of ring systems incorporating sulfur-nitrogen and other main group elements to prevent dimer formation are extremely invaluable [18]. The electrochemical data of 5-(4-Dimethylamino-benylidene)- 1,3-diethyl-2-thioxo-dihydro-pyrimidine-4,6-dione has been assess using cyclic voltammetry and convolution transforms [19-21]. The possibility of using all data obtained in individual cyclic voltam- metric experiment instead only including the data concerned with the peak values is the main advantage of the convolution tech- nique. The accuracy in mechanism diagnosis and rate constant determination would thus be increased. The convolution trans- forms or semi integral of the current is evaluated via the history dependent integral [20]. *To whom correspondence should be addressed: Email: mghanem@ksu.edu.sa Phone: +99 114670405 Investigation the Electrochemical Behavior of 5-(4-Dimethylamino-benylidene)-1,3-diethyl-2-thioxodihydro-pyrimidine-4,6-dione using Semi-integration of Current Mohamed A.Ghanem 1,* , Ibrahim S El-Hallag 2 and Prabhakarn Arunachalam 1 1 Chemistry Department, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudia Arabia 2 Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt Received: January 05, 2017, Accepted: March 15, 2017, Available online: May 18, 2017 Abstract: The electrochemical behavior of 5-(4-Dimethylamino-benylidene)-1,3-diethyl-2-thioxo-dihydro-pyrimidine-4,6-dione at a plat- inum electrode was studied by semi-integration, semi differentiation of current, and digital simulation methods in 0.1 mol/L tetra- ethylammonium perchlorate (TEACl) in acetonitrile solvent. Cyclic voltammetric study revealed that the presence of three oxidative peaks due to the presence of two electron transfer coupled by chemical reaction (EC) and followed by electron transfer (E) step then EC, i.e., the overall process is ECEEC scheme. On going to negative potential there are two unidirectional reductive peaks associated with the oxida- tive peaks. The elucidation of the electrode behavior, the electrochemical and chemical data of the compound under investigation was de- termined using sweep voltammetry, semi integration & semi differentiation of current. The calculated electrochemical parameters and the nature of the electrode reaction were established & confirmed via generation of the theoretical cyclic voltammograms. Keywords: Sweep voltammetry; convolution transforms; theoretical cyclic voltammograms Journal of New Materials for Electrochemical Systems 20, 053-057 (2017) © J. New Mat. Electrochem. Systems