N,N'-Bis(2-chloro-benz-yl)-N''-(2,2,2-trichloro-acet-yl)phospho-ric triamide.

The P atom in the title compound, C(16)H(15)Cl(5)N(3)O(2)P, exhibits a tetra-hedral coordination geometry and the phosphoryl and carbonyl groups are anti with respect to one another. The dihedral angle between the benzene rings is 44.90 (15)°. One of the 2-chloro-benzyl-amido fragments is disordered over two sets of sites with occupancies of 0.8823 (17) and 0.1177 (17). In the crystal, adjacent mol-ecules are linked via N-H⋯O(P) and N-H⋯O(C) hydrogen bonds into an extended chain running parallel to the a axis.