Coordination Chemistry of Cobalt Biguanide Complex: Ligand Interaction and Metal Complex Stability

Biguanides are versatile organic compounds known for their broad applications in medicinal chemistry, coordination chemistry, and catalysis. Biguanide, C₂N₅H₇ is a nitrogen donor bidentate ligand. Structurally, they contain two linked guanidine moieties, which enable strong chelation with metal ions, forming stable complexes. The ability of biguanides to interact with transition metals has led to the development of metal-biguanide complexes with remarkable biological and catalytic properties. These complexes exhibit diverse coordination modes influenced by steric and electronic factors, resulting in distinct physicochemical behaviours. Spectroscopic and crystallographic studies reveal their structural variations, while computational methods provide insights into their electronic configurations and reactivity. Biguanide-metal complexes have been investigated for their role in antimicrobial, anticancer, and catalytic applications, making them essential in modern chemistry. This abstract outline the synthesis, characterisation, and potential applications of biguanide-based metal complexes, emphasizing their importance in material science and medicinal research.