N,N′-Bis[(diphenylphosphinoyl)methyl]-1,4-phenylenediamine

The molecule of the title compound, C32H30N2O2P2, an oxidative derivative of N,N'-bis-[(diphenyl-phosphino)methyl]-1,4-phenyl-enediamine, occupies a special position on an inversion center. The crystal structure contains N-(HO)-O-...=P hydrogen bonds, connecting the mol-ecules to form an infinite chain along [100].