Used primarily in organic synthesis as a catalyst or reagent in coupling reactions, particularly in the formation of carbon-carbon bonds. It finds application in pharmaceutical research for constructing complex molecular frameworks, especially in the development of bioactive compounds and heterocyclic systems. Its oxalate salt form enhances stability and solubility, making it suitable for use in homogeneous catalysis under mild reaction conditions. Also employed in materials science for the synthesis of conductive polymers and ligands for metal complexation.