N,N′-Dibenzyl-N,N′-dimethyl-N′′-(2-phenyl­acet­yl)phospho­ric triamide

The P atom in the title mol­ecule, C(24)H(28)N(3)O(2)P, is in a distorted tetra­hedral P(=O)(N)(N)(2) environment. The phosphoryl group and the NH unit adopt a syn orientation with respect to each other and the N atoms have sp (2) character. The P—N bonds in the P(O)[N(CH(3))(CH(2)C(6)H(5))](2) unit are shorter than the P—N bond in the C(=O)NHP(=O) fragment. An intra­molecular C—H⋯O hydrogen bond occurs. In the crystal, pairs of P=O⋯H—N hydrogen bonds form centrosymmetric dimers. C—H⋯O contacts are also observed. Four C atoms of two benzene rings are disordered over two alternative sites with an occupancy ratio of 0.523 (12):0.427 (12).