Syntheses, crystal structures and Hirshfeld surface analyses of (3aR,4S,7R,7aS)-2-(perfluoro-pyridin-4-yl)-3a,4,7,7a-tetra-hydro-4,7-methano-iso-indole-1,3-dione and (3aR,4S,7R,7aS)-2-[(perfluoro-pyridin-4-yl)-oxy]-3a,4,7,7a-tetra-hydro-4,7-methano-iso-indole-1,3-dione.

The syntheses and crystal structures of the title compounds, C14H8F4N2O2 and C14H8F4N2O3, are reported. In each crystal, the packing is driven by C-H⋯F inter-tactions, along with a variety of C-H⋯O, C-O⋯π, and C-F⋯π contacts. Hirshfeld surface analysis was conducted to aid in the visualization of these various influences on the packing: they showed that the largest contributions to the surface contacts arise from H⋯F/F⋯H inter-actions, followed by H⋯H and O⋯H/H⋯O.