Crystal structure and Hirshfeld surface analysis of 6-Amino-8-phenyl-1,3,4,8-Tetra­hydro-2H-pyrido[1,2-A]pyrimidine-7,9-dicarbo­nitrile

In the title compound, C16H15N5, the 1,4-di­hydro­pyridine ring has a shallow boat conformation, while the 1,3-diazinane ring adopts an envelope conformation. In the crystal, pairwise N-H⋯N hydrogen bonds generate centrosymmetric dimers featuring R 2 2(12) motifs and C-H⋯N contacts connect these dimers to form double layers lying parallel to (001). Weak C-H⋯π and N-H⋯π inter­actions help to consolidate the double layers and van der Waals inter­actions occur between layers. A Hirshfeld surface analysis indicates that the most significant contributions to the crystal packing are from H⋯H (38.5%), N⋯H/H⋯N (33.3%) and C⋯H/H⋯C (27.3%) contacts. © 2021.