Tri(m-tolyl)phosphine is used in suzuki reaction. It acts as a ligand which is used in organometallic chemistry.
T. S. Cameron; K. D. Howlett and K. Miller. Investigation of the phosphorus-carbon bond lengths in aromatic phosphines. II. Crystal and molecular structures of tri-m-tolylphosphine, tri-m-tolylphosphine sulphide and tri-m-tolylphosphine selenide.Acta Cryst.1978, 34 1639-1644.