The title salt, [(C6H11)2NH2][(C6H5O)2P(O)(O)], crystallizes in the chiral space group P212121, composed of achiral cation and anion components. The strong charge-assisted N–H…O hydrogen bonds build a linear assembly along the a axis, including a non-centrosymmetric C22(6) chain graph-set motif. The intra and intermolecular C–H…O interactions as well as the C–H…π-electron ring interactions also exist in the crystal structure. Fingerprint plots are used for a detailed investigation of intermolecular interactions participating in the crystal packing. The spectroscopic features (IR, 1H NMR, 13C{1H} NMR, 31P{1H} NMR, and mass) are studied.

A new amidophosphoester, (4-Cl-C 6 H 4 O)(OC 4 H 8 N) 2 PO, was synthesized and characterized by spectroscopic methods (IR, 31 P-, 13 C-, 1 H-NMR) and single-crystal X-ray diffraction. The crystal belongs to the space group P2 1 /c, and the asymmetric unit of structure is composed of one complete molecule. The P atom has a distorted tetrahedral (O)(N) 2 P(O) environment with one of the O═P-N angles as the maximum angle at the P atom and one of the O-P-N angles as the minimum angle. The oxygen atom of the P-O-C 6 H 4-4-Cl part may be ascribed with the hybridization including a few more "s" character with respect to "sp 2 ", reflected in the P-O-C angle (127°). In the crystal, the molecules are aggregated through CH…O hydrogen bonds forming a two-dimensional array along the bc plane.