One of the most important goals in modern inorganic and organometallic chemistry is the development of well-designed ligand systems that allow the properties of metal centers to be easily varied in a controlled manner. Among the numerous ligand systems described in the chemical literature, derivatives of variously substituted [C, N] Schiff bases, and their complexes have piqued the interest of researchers due to their high stability, activity, and variability. When an organic ligand forms an M-C bond with a metal center, the metal is then further bonded to a donor atom to form a stable, five-membered metallated ring.