Synonyms: Phosphine,(1E)-1,2-ethenediylbis[diphenyl- (9CI); Phosphine, 1,2-ethenediylbis[diphenyl-,(E)-; Phosphine, vinylenebis[diphenyl-, (E)- (8CI);(E)-1,2-Bis(diphenylphosphino)ethene; (E)-1,2-Bis(diphenylphosphino)ethylene;(E)-Vinylenebis[diphenylphosphine]; NSC 132587;trans-1,2-Bis(diphenylphosphino)ethene;trans-1,2-Ethenediylbis(diphenylphosphine); trans-Bis(diphenylphosphino)ethylene