Used as a versatile nucleophilic reagent in organic synthesis, particularly in carbon-carbon bond-forming reactions. It is commonly employed to introduce the isobutyl group into carbonyl compounds such as aldehydes, ketones, and esters, yielding secondary and tertiary alcohols after hydrolysis. Frequently applied in the preparation of pharmaceuticals, agrochemicals, and fine chemicals where branched alkyl chains are required. Its reactivity makes it suitable for addition reactions and metal-halogen exchange processes in the synthesis of complex organic molecules. Requires anhydrous conditions and careful handling due to high sensitivity to moisture and air.