International Journal of Academic Multidisciplinary Research (IJAMR)   Year: 2018 | Volume: 2 | Issue: 10 | Page No.: 24-37 Thermal Studies for Co(II), Cu(II), Zn(II) and Sn(II) complexes of thiosemicarbazide (HTS) Ragab R. Amin, Ahmed A. Gomma, Yamany B. Yamany, Moamen S. Refat Abstract: There has been considerable interest in the chemistry of transition metal complexes of thiosemicarbazide, primarily because of their bioinorganic relevance(1, 2). Thiosemicarbazide usually bind to a metal ion as biden­tate N,S-donor via dissociation of the hydrazinic proton, forming five-membered chelate rings (3). This class of complexes is of particular importance because of their potentially beneficial biological (viz, antibacterial, anti­malarial, antiviral and antitumor) (2-7). Because of their simple preparation and excellent com­plexation not only of transition but also non-transition p-block elements, interesting structural characteristics of their com­plexes, along with the possibility of their analytical applica­tion, thiosemicarbazide have become a subject of intense research interest. This has resulted in a large number of papers and several reviews(8-17).