Crystal structure and Hirshfeld surface analysis of 2-oxo-4-phenyl-2,5,6,7,8,9-hexahydro-1 <i>H</i> -cyclohepta[ <i>b</i> ]pyridine-3-carbonitrile

The two mol-ecules in the asymmetric unit of the title compound, C₁₇H₁₆N₂O, have a structural overlap with a root-mean-square deviation of 1.11 Å. Both seven-membered cyclo-heptene rings adopt a chair conformation. Reciprocal inter-molecular N-H⋯O hydrogen bonds between neighbouring mol-ecules lead to the consolidation of their mol-ecular conformations. Weak C-H⋯π inter-actions between neighbouring mol-ecules are also present in the crystal. The inter-molecular inter-actions were qu-anti-fied and analysed using Hirshfeld surface analysis, revealing that H⋯H inter-actions contribute the most to the crystal packing (45.4%).