IntroductionRecently we have described a synthetic strategy which allows simple access to a range of new lattice inclusion host molecules. For example, benzylic bromination of the non­host1affords theexo,exo­dibromide2which is an effective host. While1can pack efficiently by itself, this is more difficult for the substituted analogue2which therefore prefers to include guest molecules and yields clathrate compounds.1,2Host properties are also observed for3where the quinoline rings have been replaced by quinoxalines,3,4and4where the central portion of the structure has been changed to a bicyclo[3.3.0]octane unit.5The inclusion compounds produced are noteworthy in resulting from competition between a number of potential weak intermolecular contacts such as aryl face–face, aryl edge–face, C–H⋯N, π⋯halogen, and halogen–halogen interactions.6,7It is the most effective combination of molecular size, shape, and these supramolecular synthons8which leads to the observed crystal structure. Hence, although the hosts2–4have very similar molecular structures,the lattice packing modes of their inclusion compounds can vary considerably.