Crystal structure and C-H...F hydrogen bonding in the fluorinated bis-benzoxazine : 3,3'-(ethane-1,2-di­yl)bis­(6-fluoro-3,4-di­hydro-2H-1,3-benzoxazine)

The title fluorinated bis­benzoxazine, C18H18F2N2O2, crystallizes with one half-mol­ecule in the asymmetric unit, which is completed by inversion symmetry. The fused oxazine ring adopts an approximately half-chair conformation. The two benzoxazine rings are oriented anti to one another around the central C—C bond. The dominant inter­molecular inter­action in the crystal structure is a C—H⋯F hydrogen bond between the F atoms and the axial H atoms of the OCH2N methyl­ene group in the oxazine rings of neighbouring mol­ecules. C—H⋯π contacts further stabilize the crystal packing.