Crystal structure and Hirshfeld surface analyses, crystal voids, inter-molecular inter-action energies and energy frameworks of 3-benzyl-1-(3-bromoprop-yl)-5,5-di-phenyl-imidazolidine-2,4-dione.

The title mol-ecule, C(25)H(23)BrN(2)O(2), adopts a cup shaped conformation with the distinctly ruffled imidazolidine ring as the base. In the crystal, weak C-H⋯O hydrogen bonds and C-H⋯π(ring) inter-actions form helical chains of mol-ecules extending along the b-axis direction that are linked by additional weak C-H⋯π(ring) inter-actions across inversion centres. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H⋯H (51.0%), C⋯H/H⋯C (21.3%), Br⋯H/H⋯Br (12.8%) and O⋯H/H⋯O (12.4%) inter-actions. The volume of the crystal voids and the percentage of free space were calculated to be 251.24†à (3) and 11.71%, respectively, showing that there is no large cavity in the crystal packing. Evaluation of the electrostatic, dispersion and total energy frameworks indicate that the stabilization is dominated by the dispersion energy.