Used as a catalyst precursor in organometallic reactions, particularly in carbonylation and hydrogenation processes. It serves as a source of reactive rhenium(I) centers in homogeneous catalysis. Commonly employed in the synthesis of complex organic molecules where controlled reactivity and stability under inert conditions are required. Its labile tetrahydrofuran ligands allow for easy substitution, enabling the formation of other rhenium complexes for specialized applications in chemical research and development.