Fig. 4. (Top) View of a fragment of the interpenetrated pcu frameworks illustrating: (a) the solvent-excluded surface showing void channels running along a + c direction; (b) the 1·PhNO₂ molecules located in the channels (the shown PhNO₂ molecule represents the average of two slightly disordered positions); and (c) C_(3,8-phen)⋯C_(PhNO2) (red, blue thin bonds) and C_(Au(CN)2)⋯C_(PhNO2) (black-red thin bonds) intermolecular interactions shorter than the sum of van der Waals radii at 228 K. Red-white thin bonds correspond to the Au⋯Au interactions between the two interpenetrated frameworks. (Bottom) View down to [010] direction of the interpenetrated frameworks marked in light- and dark-blue LS state (d), light- and dark-red (HS state) (e) including the PhNO₂ molecule located in the channels (the inner green/blue squares correspond to the unit cell); (f) superposition of one of the two frameworks illustrating the distortion of the structure when moving from the LS state (blue) to the HS state (orange).