Crystal structure and Hirshfeld surface analysis of 7,7-dimethyl-2-phenyl-3,3a,4,6,7,8,9,9a-octa-hydro-1-benzo[]iso-indole-1,5(2)-dione.

The title compound, CHNO, was obtained the reaction of -allyl--phenyl-acryl-amide with 3-iodo-cyclo-hex-2-en-1-one using PdCl(PPh) as a catalyst. The compound crystallizes in the monoclinic space group 2/. The fused-ring system is not planar and the five- and six-membered rings are -fused. The mol-ecular geometry is partially stabilized by an intra-molecular C-H⋯O hydrogen bond, forming an (6) ring motif. In the crystal, mol-ecules are linked by C-H⋯O and C-H⋯π inter-actions into a three-dimensional network. To further analyse the inter-molecular inter-actions, a Hirshfeld surface analysis was performed. The results indicate that the most important contributions to the overall surface are from H⋯H (65.5%), O⋯H/H⋯O (17.5%) and C⋯H/H⋯C (14.3%) inter-actions.