Diphenylzinc is primarily used in organic synthesis as a reagent for the introduction of phenyl groups into various organic compounds. It is particularly valuable in the formation of carbon-carbon bonds, making it essential in the production of complex organic molecules. This compound is often employed in the synthesis of pharmaceuticals, where precise phenyl group incorporation is required. Additionally, it serves as a catalyst or co-catalyst in polymerization reactions, aiding in the creation of specific polymer structures. Its reactivity with other organometallic compounds also makes it useful in the development of advanced materials and in research focused on organometallic chemistry.