N,N′-Dibenzyl-N,N′-dimethyl-N"(p-tolyl)phosphoric triamide

The asymmetric unit of the title compound, C23H28N3OP, contains two independent molecules with significant conformational differences. For example, the torsion angles N-C-C-C involving the N-benzyl moieties are 57.3 (7) and 11.6 (8)degrees in one molecule and 76.5 (7) and 97.4 (7)degrees in the other. In each molecule, the P atom exhibits a distorted tetrahedral conformation [the bond angles at P are in the ranges 104.7 (2)-115.2 (2) and 105.1 (2)-115.1 (2)degrees in the two molecules], and the phosphoryl group and the N-H group adopt an anti orientation with respect to one another. In the crystal, molecules are linked via N-H center dot center dot center dot O(P) hydrogen bonds, forming a chain parallel to the a axis.