Figure 4.

(a) Space-filling and tubular representations of the solid-state structure of 8²⁺ revealing that the isopropyl groups extend over the perylene core of the dication, inhibiting π···π stacking of these dications along one dimension. (b) View down the N–N vector of a single 8²⁺ dication revealing the angle between the plane of the diazaperopyrenium unit and the 2,6-diisopropylphenyl substituents located in the 2 and 9 positions of the dication. (c) Tubular (and space-filling) representations of the solid-state superstructure of 8²⁺ revealing a herringbone-like packing motif and the absence of any π···π interactions. Purple and green denote dications that are orientated in the same direction.