Used as a versatile reagent in organic synthesis, particularly in the formation of carbon-carbon bonds. It acts as a strong nucleophile and base, analogous to Grignard reagents, and is directly employed in Grignard-type reactions such as nucleophilic addition to carbonyls, aldehydes, or other electrophiles. Commonly used in the synthesis of complex organic molecules, including pharmaceuticals and fine chemicals, where controlled alkylation or functional group transformations are required. Its reactivity enables selective transformations under anhydrous conditions, often improving yield and efficiency in multi-step syntheses.