The contents embodied in this book are with respect to, the complexes of Cu(II), Co(II), Ni(II), Mn(II) and Fe(III) synthesized from 2-amino-6-substituted benzothiazoles and their biological activities. The ligands and complex compounds are characterized by using various physicochemical methods.The conclusions drawn from the results obtained from various techniques can be summarized as follows:1) Synthesis and Analytical Data of Ligands and their Metal Complexes. 2)Magnetic Susceptibility of the Complexes 3) Spectroscopic Studies of Cu(II), Co(II), Ni (II), Mn(II), and Fe(III) Complexes -a)a) Electronic Absorption Spectral (EAS) Studies of the Metal Complexes-b) Infrared (IR) Spectral Studies of Complexes4)Thermal Decomposition Studies of Metal Complexes 5)X-ray Diffraction Studies of Complexes 6)Antibacterial and Antifungal Studies of 2-amino-6-substituted benzothiazoles and their Metal Complexes