Widely used as a highly efficient ruthenium-based metathesis catalyst, this compound enables ring-closing metathesis (RCM), cross metathesis (CM), and ring-opening metathesis polymerization (ROMP) in organic synthesis. It is particularly valued for its enhanced stability and activity in the formation of complex molecules, including pharmaceuticals, natural products, and advanced materials. The presence of the N-heterocyclic carbene (NHC) ligand improves catalyst longevity and functional group tolerance, allowing reactions to proceed under mild conditions with high yields. It is commonly employed in the synthesis of macrocyclic structures and olefin-rich frameworks where precision and reliability are critical. Its ease of handling and compatibility with various substrates make it a preferred choice in both academic research and industrial applications.