AbstractThe compound N-carbamoyl-piperidine-4-carbocylic acid was synthesized and characterized by FT-IR and NMR spectra. Its molecular structure was solved by single crystal X-ray diffraction and compared with DFTB (density-functional tight-binding) theoretical calculations in the solid state. In the title compound, C7H12N2O3, the piperidine ring adopts a chair conformation. The mean plane between the carboxylate and the ureid groups make a dihedral angle of 35.3(3)°. The structure is stabilized by intermolecular O–H···O, N–H···O and C–H···O hydrogen bonds in a three-dimensional network.Keywords: Crystal structureDFTB calculationhydrogen bondsN-carbamoyl AcknowledgmentsThis work was supported by CDCHT-ULA (grant C-1853-13-08-A) and FONACIT (grant LAB-97000821).