Acta Cryst. (2012). E68, o2444 [ doi:10.1107/S1600536812031418 ]
Abstract: A second monoclinic polymorph of the title molecule, C15H21FN3O4P, is reported in the space group P21/n and compared to the previously reported C2/c space group [Gholivand et 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 a syn conformation with respect to each other and in the crystal, intermolecular N-HO=P hydrogen bonds form dimeric aggregates.
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