A novel mannich base of an imide and its cobalt (II) complex was synthesized and characterized. Their structural features have been established based on the data obtained from the FT-IR, UV-visible, Mass, and NMR spectra of synthesized compounds which are recorded and discussed here. The antioxidant property of the ligand and its complexes were studied using the scavenging nature of the DPPH free radical. To determine the antimicrobial property of the synthesized ligand and its Co(II) complex, it was tested for its potency against microorganisms such as Escherichia coli, Staphylococcus aureus, Aspergillus niger, and Candida albicans, employing the agar-well diffusion method