Widely used in organic synthesis as a powerful reducing agent, especially in carbon-carbon bond-forming reactions. It promotes reductive couplings of carbonyl compounds, such as in the pinacol coupling reaction. It is also employed in the selective reduction of functional groups including sulfoxides, epoxides, and halides. Its ability to mediate Barbier-type reactions under mild conditions makes it valuable for constructing complex organic frameworks. Additionally, it serves as a single-electron transfer agent in cascade and cyclization reactions, enabling efficient synthesis of cyclic and polycyclic structures.