N-(4-Fluoro­benzo­yl)-N′,N′′-diisopropyl­phospho­ric triamide

The asymmetric unit of the title phospho­ric triamide, C₁₃H₂₁FN₃O₂P, consists of two independent mol­ecules. In each mol­ecule, the P=O group and the N—H unit belonging to the C(O)NHP(O) fragment are in a syn conformation with respect to each other. An intra­molecular N—H...O hydrogen bond occurs in each mol­ecule. The P atom adopts a distorted tetra­hedral environment. The methyl groups of an isopropyl fragment are disordered over two sets of sites with refined occupancies of 0.458 (5) and 0.542 (5). In the crystal, mol­ecules are linked through N—H...O(=P) and N—H...O(=C) hydrogen bonds into chains along [001].

Diphenyl (isopropyl­amido)­phosphate

The P atom in the title compound, C₁₅H₁₈NO₃P, is in a distorted tetra­hedral P(O)(O)₂N environment; the bond angles at P are in the range 98.16 (6)–115.82 (6)°. In the crystal, adjacent mol­ecules are linked via N—H...O=P hydrogen bonds into a chain running parallel to the b axis. The methyl groups are disordered over two sets of sites in a 0.677 (14):0.323 (14) ratio. The crystal studied was a non-merohedral twin with a refined minor component of 22.31 (4)%.