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In the phospho­ric triamide mol­ecule of the title compound, C6H14N+·C2H3O2·C18H36N3OP, the P atom displays a distorted tetra­hedral geometry and the cyclo­hexyl rings adopt chair conformations with the NH groups in equatorial positions. In the crystal, the cations, anions and phosphoric triamide mol­ecules are linked via N—H...O hydrogen bonds into a two-dimensional array parallel to the bc plane. The O atom of the P(O) group acts as a double-hydrogen-bond acceptor.

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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—H...O=P hydrogen bonds form dimeric aggregates.

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The P atom in the title mol­ecule, C15H20F2N3O2P, is in a distorted tetra­hedral P(O)(N)(N)2 environment. The phosphoryl group and the NH unit adopt a syn orientation with respect to each other. An F atom at position 2 and an H atom at position 6 are found to occupy similar sites in a 0.70:0.30 ratio and were refined with fixed occupancies. The pyrrolidin-1-yl rings are disordered over two sets of sites, with site occupancies of 0.566 (6) and 0.434 (6), and were refined using a two-part model. In the crystal, hydrogen-bonded dimers linked by pairs of N—H...O(P) hydrogen bonds generate an R22(8) ring motif.

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In the title mol­ecule, C16H17ClF2N3O2P, the N—H unit of the C(=O)NHP(=O) fragment adopts a syn orientation with respect to the P=O group. The two F atoms and the Cl atom of the ClF2C group are disordered over two sets of sites with refined occupancies of 0.605 (6) and 0.395 (6). In the crystal, mol­ecules are linked via N—H...O=C hydrogen bonds and the (N—H...)(N—H...)O=P group into chains along [010].
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