2,4,6,8-Tetra­kis(2-fluoro­phen­yl)-3,7-diaza­bicyclo­[3.3.1]nonan-9-one

The title compound, C(31)H(24)F(4)N(2)O, exists in a chair–boat conformation with an equatorial orientation of the 2-fluoro­phenyl groups on both sides of the secondary amino group of the chair form. The benzene rings in the ‘chair’ part are inclined to each other at 19.4 (1)°, while the equivalent angle between the benzene rings in the ‘boat’ part is 75.6 (1)°. One F atom was treated as disordered over two positions in a 0.838 (4):0.162 (4) ratio. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into chains along [001] and these chains are held together via weak N—H⋯F and C—H⋯F inter­actions.