“…The antibacterial, antiviral and anticancer activities possessed by substituted thiosemicarbazides and thiosemicarbazones have generated rapidly growing interest in the chemical, biochemical and structural aspects of these compounds (Johnson, Joyner & Perry, 1952;French & Blanz, 1966;Agrawal, Booth & Sartorelli, 1968;Agrawal, Cushley, McMurray & Sartorelli, 1970;Williams, 1972;Agrawal, Booth & Sartorelli, 1973;Kuroda, Neidle & Wilman, 1984). It has been suggested that the biological activities of these groups of N,S donor ligands originate from their metal-chelating and reductive capacities (Kirschner, Wei, Francis & Bergman, 1966;Palenik, Rendle & Carter, 1974). Comparative studies of the antibacterial activity of 4-phenylthiosemicarbazide and some of its ring-substituted derivatives revealed that the activity of the para methoxy and the para chloro derivatives © 1987 International Union of Crystallography increased significantly over that of 4-phenylthiosemicarbazide (Nandi, Chaudhuri, Mazumdar & Ghosh, 1984e;present work).…”