This chiral cobalt(II) salen complex, known as Jacobsen's catalyst, is primarily utilized as a catalyst in asymmetric epoxidation of alkenes, enabling the stereoselective formation of enantiomerically enriched epoxides. It is also widely employed in the hydrolytic kinetic resolution of racemic epoxides to produce valuable chiral diols and remaining epoxides with high enantiomeric excess. These applications are essential in the synthesis of pharmaceuticals, agrochemicals, and fine chemicals, where chirality is critical for biological activity. Its high efficiency, selectivity, and stability under mild reaction conditions make it a cornerstone in modern asymmetric catalysis and organic synthesis.