12-Bis(diphenylphosphino)ethane Tags: Chemical Compound, Chemical Substance.12-Bis(diphenylphosphino)ethane (dppe) is a commonly used bidentate ligand in coordination chemistry. Dppe is almost invariably chelating although there are examples of unidentate (e.g. W(CO)5(dppe)) and of bridging behavior. thumbnail IUPAC name Ethane-12-diylbis(diphenylphosphane) Learn more... Loading...