A novel series of symmetric compartmental 16-membered tetraaza macrocyclic complexes were synthesized using template method with the help of ligands 1,8-diaminonaphthalene, 2,4-dioxopentane and metal ions in 2:2:1 ratio. The synthesized complexes afforded hexacoordinated geometry of the general formula [M(TML)X2] where TML= Tetraazamacrocyclic ligand; M = Co(II), Ni(II) and Cu(II); X = Cl–, CH3COO– or NO3 -or M= Zn (II)and Cd(II); X = CH3COO–. The resulting complexes have been characterized with the help of elemental analyses, conductance measurements, magnetic measurements, TGA, electronic, infrared, far infrared, NMR, ESR and Mass spectral studies. The optimized energy calculations were also carried out. Powder X-ray diffraction points towards the presence of triclinic crystal system. The metal complexes have also been identified for antioxidant activities as well as screened for in vitro antimicrobial activities.