Tricyclopentylphosphine is primarily used as a ligand in organometallic chemistry, where it plays a crucial role in stabilizing metal complexes. Its bulky structure makes it particularly effective in catalysis, especially in reactions involving cross-coupling, hydrogenation, and hydroformylation processes. The steric hindrance provided by the cyclopentyl groups enhances selectivity and reactivity in these catalytic systems. Additionally, it is employed in the synthesis of fine chemicals and pharmaceuticals, where precise control over reaction pathways is essential. Its unique properties also make it valuable in the development of advanced materials, including polymers and coordination compounds with specific electronic or structural characteristics.