A second monoclinic polymorph ofN-[bis(morpholin-4-yl)phosphinoyl]-4-fluorobenzamide with theP21/nspace group

A second monoclinic polymorph of the title molecule, C15H21FN3O4P, is reported in the space groupP21/nand compared to the previously reportedC2/cspace group [Gholivandet al.(2006).Polyhedron,25, 711–721]. The asymmetric unit of the title compound consists of two independent molecules. The P atoms adopt a distorted tetrahedral environment. In the C(O)NHP(O) fragment, the P=O and the N—H groups are in asynconformation with respect to each other and in the crystal, intermolecular N—H...O=P hydrogen bonds form dimeric aggregates.