2,4,6,8-Tetra-kis(4-bromo-phen-yl)-3,7-diaza-bicyclo-[3.3.1]nonan-9-one

Crystal structure and Hirshfeld surface analysis of 2,4,6,11-tetra-kis-(4-fluoro-phen-yl)-9-oxa-1,5-di-aza-tri-cyclo-[5.3.1.03.8]undeca-ne

The title compound, C32H26F4N2O, crystallizes in the monoclinic space group P21/n with four mol-ecules in the unit cell. The compound was prepared by the NaBH4 reduction of 4,8,9,10-tetra-kis-(4-fluoro-phen-yl)-1,3-di-aza-adamantan-6-one in chloro-form and ethanol as solvent. The piperidine rings exhibit chair and boat conformations, and all four fluoro-phenyl groups are oriented in the equatorial direction. The crystal structure features C-H⋯F hydrogen bonds, C-H⋯π, N-H⋯π and π-π inter-actions. Hirshfeld surface and two-dimensional fingerprint analysis show that van der Waals inter-actions constitute a major contribution to the inter-molecular inter-actions, with H⋯H contacts accounting for 37.9% of the surface.